MCQ OF MAGNETIC EFFECTS & EMI, CLASS: X

MAGNETISM AND EMI

CLASS: X

1. When a bar magnet is broken into two pieces :
(A) we will have a single pole on each piece (B) each piece will have two unlike poles
(C) each piece will have two like poles (D) None of these

2. The magnetic field intensity produced due to a current carrying coil is maximum at :
(A) any point (B) any point lying on the axis of the coil (C) points lying between centre of the coil and its circumference (D) none of these

3. The direction of magnetic lines of force produced by passing a direct current in a conductor is :
(A) perpendicular to the conductor & coming outwards
(B) parallel to conductor
(C) surrounding the conductor and of circular nature
(D) perpendicular to the conductor & coming inwards

4. Which of the following statement is not correct about two parallel conductors carrying equal currents in the same direction ?
(A) Every conductors will experience a force. (B) The two conductors will repel each other.
 (C) Each of the conductors will move if not prevented from doing so. (D) none of these

5. Which of the following determine the direction of magnetic field due to a current carrying conductor ?
(A) Faraday’s laws of electromagnetic induction. (B) Fleming’s left-hand rule.
(C) Lenz’s law. (D) Maxwell’s cork screw rule. (E) none of these.

6. If the cylindrical bar magnet is kept along axis and  rotated about its axis, then :
(A) a current will be induced in the coil (B) no current will be induced in the coil. (C) only emf will be induced in the coil (D) am emf and current both will be induced in the coil (E) none of these

7. In the figure QR is a vertical conductor and the current I flows from R to Q. P is a point on the horizontal plane and is to the south of the wire. The direction of the magnetic field at P due to the current will be towards :
(A) upward (B) north (C) east (D) west (E) none of these

8. A length of wire carries steady current. It bent first to form a circular plane coil of one turn. The same length is now bent to give a double loop of smaller radius. The magnetic field produced at the centre by the same current will be :
(A) a quarter of its first value (B) a half of first value (C) four times its first value (D) unaltered (E) none of these

9. The intensity of a magnetic field is defined as the force experienced by a :
(A) standard compass (B) unit positive charge
(C) unit negative charge (D) unit north pole

10.. A wire carrying a current of 5A is placed perpendicular to a magnetic induction of 2T. The force on each centimeter of the wire is :
(A) 1N (B) 100 (C) 0.1 N (D) 10 N

11. If a soft iron piece is buried under the surface of earth in the north and south direction, then
(A) it will acquire the properties of a magnet (B) its properties will not change
(C) it will behave like an insulator (D) can’t say with surity

12. Force acting on a stationary charge Q in the magnetic field B is -
(A) B Q V (B) BV/Q (C) Zero (D) BQ/V

13. The permanent magnets are kept with soft iron pieces at ends and keepers :
(A) to magnetise the soft iron pieces (B) to increase the strength of the magnets
(C) to avoid self demagnetisation (D) for physical safety of the magnets

14. The device whish is used for converting mechanical energy into electrical energy is called :
(A) electric motor (B) dynamo (C) transformer (D) battery

15. In case of a DC generator a large number of coils each having many turns and arranged in different turns are used :
(A) to get high voltage DC (B) to get high ampere DC
(C) to get smooth DC (D) get pulsating current

16. Lenz’s law is a consequence of the law of conservations of :
(A) energy (B) momentum (C) angular momentum (D) charge and mass

17. In a DC generator, the induced e.m.f. in the armature is :
(A) DC (B) AC` (D) fluctuating DC (D) both AC and DC

18. The induced emf produced when a magnet is inserted into a coil does not depend upon :
(A) the number of turns in the coil (B) the magnetic moment of the magnet
(C) the magnetic moment of the magnet (D) all of these  (E) none of these

19. When the current through a solenoid increases at a constant rate, the induced current :
(A) is a constant and in the direction of inducing current
(B) is a constant and is opposite to the direction of inducing current
(C) increases with time and is in the direction of inducing current
(D) increases with time and opposite to the direction of inducing current

20. The device whish is used for converting electrical energy into mechanical energy is called :
(A) electric (B) dynamo (C) transformer (D) battery

21.The current in the armature of a dc motor is maximum when :
(A) the motor achieves maximum speed (B) the motor achieves intermediate speed
(C) the motor is switched on (D) the motor is switched off

22. The effect of using split rings in a simple DC motor is that :
(A) the direction of rotation of the coil is reversed
(B) the current in the coil always flows in the same direction
(C) the direction of the current flowing in the coil is reversed
(D) None of these

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MCQ OF LIGHT, CLASS: X

LIGHT

CLASS: X

1. The path along which light travels in a homogenous medium is called the :
(A) beam of light (B) ray of light (C) pencil of light (D) none of these

2. A thin layer of water is transparent but a very thick layer of water is :
(A) translucent (B) opaque (C) most transparent (D) none of these

3. Air is not visible because it _
(A) is nearly a perfectly transparent substance
(B) neither absorbs nor reflects light
(C) transmits whole of light
(D) all the above are correct

4. According to laws of reflection of light :
(A) Angle of incidence is equal to the angle of reflection
(B) Angle of incidence is less than the angle or reflection
(C) Angle of incidence is greater than the angle of reflection
(D) None of these

5. A swimming pool appears to be 2m deep. It actual depth is ( refractive index for water = 1.33)-
(A) 2.66 m (B) 2m (C) 2.34 m (D) 2.54 m

6 A ray of light is incident on a plane mirror at an angle x  and the angle between the incident and reflected rays is 65, what is the value of x :
(A) 32.5 (B) 35 (C) 45 (D) None of these

7. When a ray of light enters a transparent medium it undergoes change is :
(A) Frequency only (B) Wavelength only (C) Wavelength and velocity both (D) Velocity and frequency both

8. The focal length of a concave mirror is f m  and the distance from the object to the principal focus is a m. The magnitude of magnification obtained will be-
(A) (f + a)/f (B) f/a (C) f / a (D) f2/a2

9. The magnification of an object placed 10 cm from a convex mirror of radius of curvature 20 cm will be.
(A) 0.2 (B) 0.5 (C) 1 (D) infinity

10. The image formed by a concave mirror is observed to be virtual, erect and larger than the object. the position of the object should be-
(A) between the focus and the centre of curvature.
(B) at the centre of curvature
(C) beyond the centre of curvature
(D) between the pole of the mirror and the focus

11. The magnification produces by a concave mirror-
(A) is always more the one
(B) is always less than one
(C) is always equal to one
(D) may be less than or greater than one

12. The image formed by a concave mirror is real, inverted and of the same size as that of the object. The position of the object should be :
(A) Beyond C (B) Between C and F (C) At C (D) At F

13. A boy is standing in front of a place mirror at a distance of 3 m from it. What is the distance between the boy and his image ?
(A) 3 m (B) 4.5 m (C) 6 m (D) none of these

14. Refractive index of glass with respect to air is 1.5 and refractive index of water with respect to air is 3/4  What will be the refractive index of glass w.r.t water ?
(A) 1 (B) 1.5 (C) 1.125 (D) -10

15. The refractive index of a medium depends upon -
(A) Nature of material of the medium
(B) Optical density of the medium
(C) Wavelength of light
(D) All of these

16. A ray of light in incident normally on a rectangular piece of glass. The value of angle of refraction will be-
(A) 1800 (B) 900 (C) 450 (D) 00

17. A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 4/3 and the fish is 12 cm below the surface, the radius of the circle is -
(A) 12 × 3 × 5 cm (B) 12 × 3 × 7 cm (C) 12 × 5 / 2 cm (D) None of these

18. The speed of light is vacuum is 3.0 ×108 m/s. If the refractive index of a transparent liquid is 4/3, then the speed of light in the liquid is -
(A) 2.25 × 108 m/s (B) 3 × 108 m/s (C) 4 × 108 m/s (D) 4.33 × 108 m/s

19. 1. To get a real and inverted image of the same size as that the object should be placed in front of the convex lens at:
(A) F (B) 2F  C) between F and 2F (D) away from 2F, where F is focal length

20. A spherical mirror and a spherical lens have each focal length of - 10cm. The mirror and lens are :
(A) both convex (B) both concave (C) mirror is convex and lens is concave (D) mirror is concave and lens is convex

21. The power of lens having focal length 50 cm is :
(A) 1/2 D (B) 2D (C) 3D (D) 0.2 D

22. The focal length of a lens of power - 2.0 D is :
(A) -2.0 m (B) 0.2 m (C) 0.5 m (D) 0.5 m

23. Two lenses of +5D and -5D are placed in chose contact. The focal length of the combination is :
(A) Zero (B) infinity (C) Zero or infinity  (D) None of these

24 A student needs a lens of power -2.0 dioptre to correct his distant vision. The focal length of the given lens is :
(A) + 50 cm (B) -50 cm (C) 10 cm (D) -10 cm

25. Focal length of coloured goggles (without number) is :
(A) zero (B) infinity (C) between zero & infinity (D) None of these

26. Where should an object be placed so that a real and inverted image of very large size is obtained, using a convex lens ?
(A) At the focus (B) At 2F (C) Between F & 2F (D) Beyond 2F

27. A convex lens is :
(A) Thicker at the middle, thinner at the edges
(B) Diverging
(C) Thicker at the edges thinner in the middle
(D) Of uniform thickness everywhere

28. A glass rod of refractive index 1.42 is immersed in kerosene. The refractive index of kerosene is 1.42. Then the rod will :
(A) appear bent (B) appear raised above the liquid
(C) become invisible (D) none of the above

29. The power of a lens whose focal length is 25 cm is :
(A) 4 Dioptre (B) 25 Dioptre (C) 0.04 Dioptre (D) 2.5 Dioptre

30. A thin lens is made with a material having refractive index n = 1.5. Both the side are convex. It is dipped in water ( n = 1.33), it will be have like :
(A) a convergent lens (B) a divergent lens
(C) a rectangular slab (D) a prism

31. Choose the correct option :
(A) If the final rays are converging, we have a real image.
(B) If the incident rays are converging, we have a real image.
(C) If the image is virtual, the corresponding object is called a virtual object.
(D) The image of a virtual object is called a virtual image.

32. A convex lens forms a real image of a point object placed on its principal axis. If the upper half on the lens is painted black :
(A) the image will be shifted backward
(B) the image will not be shifted
(C) the intensity of the image will decrease
(D) both (B) & (C)

33. The minimum distance between an object and its real image formed by a convex lens of focal length ƒ is :
(A) ƒ (B) 2ƒ (C) 3ƒ` (D) 4ƒ

BY
ARANBIR SINGH

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MCQ OF CELL AND TISSUE, PART - A, CLASS: IX

CELL AND TISSUE

CLASS: IX

TYPE - 1

1. The mode of nutrition in all fungi is characteristically
(A) Symbiotic (B) autotrophic (C) holozoic (D) saprotrophic

2. The reserve food in fungi is
(A) starch (B) cyanophycean starch
(C) glycogen (D) glycogen and fat

3. The algal partner of a lichen is called as
(A) Mycobiont (B) Phycobiont
(C) Both of the (A) and (B) (D) None of the above

4. Pteridophytes are known as
(A) sea plants (B) vascular cryptogames
(C) club mosses (D) horse tails

5. Gymnosperms are characterized by
(A) non-motile male gametes (B) naked seeds
(C) Winged seeds (D) true fruits

6. Which one is mismatched?
(A) Flagella …………. Euglena (B) Pseudopodia ………… Amoeba
(C) Cilia ………Paramecium (D) Flagella ……….. Plasmodium

7. Contractile vacuole is present in
(A) Amoeba (B) Euglena
(C) Paramecium (D) All of the above

8. ‘Venus flower basket’ is the dried skeleton of
(A) Euspongia (B) Euplectella (C) Spongilla (D) Leucosolenia

9. Choanocytes are unique to
(A) Protozoa (B) Porifera (C) Mollusca (D) Echinodermata

10. Cnidaria is characterised by
(A) nematoblasts (B) coelenteron
(C) tissue level of organisation (D) all of the above

11. Mesoglea is characteristic of
(A) Platyhelminthes (B) Aschelminthes (C) Cnidaria (D) Mollusca

12. True jelly fish (e.g., Aurelia) belongs to class
(A) Hydrozoa (B) Anthozoa (C) Scyphozoa (D) Both B and C

13. Polymorphism is exhibited by
(A) Hydra (B) Physalia (C) ) Octopus (D) Crab

14. Comb jellies belong to
(A) Scyphozoa (B) Hydrozoa (C) Ctenophora (D) Both A and B

15. Platyhelminthes are called
(A) round worms (B) flat worms (C) blind worms (D) none of the above

16. In Platyhelminthes, the excertory organs are.
(A) nephridia (B) malpighian tubules
(C) flame cells (solenocytes) (D) green glands

17. Platyhelminthes are
(A) coelomates (B) pseudiocoelomates (C) ) haemocoelomates (D) Acoelomates

18. The common name for Ascaris is
(A) shipworm (B) pinworm (C) tapeworm (D) round worm

19. Metamerism is characteristic feature of
(A) Chordata (B) Annelida (C) Mollusca (D) Nematoda

20. The excretory organs of Annelida are
(A) nephridia (B) statocysts (C) archeocytes (D) none of the above

TYPE - 2

1. The first person to observe a cell under microscope was
(A) M. Schleiden
(B) T. Schwann
(C) Robert Hook
(D) A.V.Leeuwenhoek

2. Cell theory was propounded by
(A) Morgan
(B) Halden
(C) Schleiden and Schwann
(D) Robert Hooke

3. The word cell was coined by
(A) Robert hooke
(B) Weismann
(C) Cuvier
(D) Darwin

4. Nucleus discovered by
(A) Robert Hooke
(B) Robert Brown
(C) Dujardin
(D) Purkinje

5. Smallest cells so far known are
(A) Bacteria
(B) blue green algae
(C) PPLOs
(D) human egg

6. Which of the following is the longest cell of animal kingdom?
(A)Bacteria
(B) Nerve cell
(C) Virus
(D) Muscle cell

7. Which one of the following is an example of prokaryotic cell?
(A)Typical plant cell
(B) Typical animal cell
(C) Bacteria
(D) None of these

8. What is cytology?
(A) Study of cytoplasm
(B) Study of structure and composition of cell
(C) Study of animal cell only
(D) Study of cell only

9. Who coined term protoplasm?
(A)Leeuwenhoek
(B) Purkinje
(C) Robert hooke
(D) Robert Brown

10. Cell is
(A) Hereditary unit of life 
(B) Structural unit of life
(C) Functional unit of life
(D) all of the above

11. What is more abundant in smooth endoplasmic reticulum?
( A) Cistemae and vesicle
(B) Tubules
(C) Tubules and vesicles
(D) Cistemae

12. Mitochondria are concerned with
(A) Kreb cycle
(B) C, cycle
(C) glycolysis
(D) none of the above

13. Which of the following organelle is the site of Kreb cycle?
(A) Ribosome’s
(B) Lysosomes
(C) eukaryotic cells
(D) Nucleus

14. Mitochondria are absent in
(A) Prokaryotic cells
(B) RBC of mammals
(C) eukaryotic cells
(D) (A) and (B) Both

15. Mitochondria stores energy in from of
(A) Heat energy
(B) ATP
(C) light energy
(D) none of the above

16. The ATP synthesizing units of Mitochondria are
(A) Oxysomes
(B) peroxysomes
(C) glyoxysomes
(D) lysosomes

17. Lipid synthesis is performed by
(A) Rough ER
(B) smooth ER
(C) both of above
(D) none of the above

18. Who observed Mitochondria at first?
(A) Porter
(B) Palade
(C) Koliker
(D) Camilo Golgi

19. Detoxification of body is done by?
(A) Mitochondria
(B) lysosomes
(C) Smooth endoplasmic reticulum
(D) rough endoplasmic reticulum

20. Golgi apparatus is made of
(A) Cisternae
(B) vesicles
(C) golgian vacuoles
(D) all of the above

21.Which of the following is called as ‘Suicidal bags’ ?
(A) Centrosome
(B) Lysosome
(C) Microsome
(D) Mesosomes

22. Eukaryotic ribosomes are
(A) 30s
(B) 50s
(C) 80s
(D) 70s

23. Plastids that are white in colour (Pigment free)
(A)chloroplast
(B) lysosome
(C) leucoplast
(D) Chromoplast

24. Striking difference between a plant cell and an animal cell is due to the presence
(A) mitochondria
(B) plasma membrane
(C) cell wall
(D) ribosome

25. Tonoplast is the membrane surrounding the
(A) cytoplasm
(B) vacuole
(C) nucleus
(D) mitochondria

26. Lysosomes are responsible for
(A) protein synthesis
(B) digestion of organic molecules
(C)fat synthesis
(D) fat emulsification

27. In prokaryotic cell
(A) nucleus is developed
(B) membrane bounded organelles are present
(C) double membrane bounded organelles are absent
(D) none of these

28. A typical plant cell contains
(A) cell well
(B) plastids
(C) large vacuole
(D) all of the above

29. The waste disposal system of cell is formed by
(A) lysosomes
(B) peroxysomes
(C) mitochondria
(D) glyoxysomes

30. In which cell Centriole is absent ?
(A) plant cell
(B) Animal cell
(C) Both of above
(D) None of above

31 A group of cells having common origin and performing similar function is called
(A) tissue
(B) organ
(C) organ system
(D) cell aggregate

32. Meristems are cells that
(A) store food
(B) help in excretion
(C) provide support
(D) divide continuously to produce new cells

33. Plant length is increased by the activity of
(A) apical meristem
(B) lateral meristem
(C) cambium
(D) all of the above

34. In plants, cell division is restricted to
(A) Meristematic cells
(B) permanent cells
(C) xylem
(D) phloem

35. In grasses the length of increases by the activity of
(A) apical meristem
(B) intercalary meristem
(C) lateral meristem
(D) none of these

36. Special feature of dividing cells is
(A) large lacuna (B) thick cell walls
(C) dense cytoplasm devoid of lacuna (D) large intercellular spaces

37. Totipotency is present in
(A) meristem
(B) cambium
(C) phloem
(D) cork

38. Which of the following is a feature of Meristematic tissues ?
(A) Thin cell wall
(B) Compact tissue
(C) Large no. of cell organelles are present in the cells of tissues.
(D) All of the above

39. Which of the following plant tissue is formed by permanent tissue ?
(A) primary tissue
(B) Secondary tissue
(C) Both of above
(D) None of above

40. Which of the following plant tissues causes growth in girth of stem and root ?
(A) Apical meristem
(B) Intercalary meristem
(C) Lateral meristem
(D) None of the above

41. A permanent tissue of plant consisting of thin walled living cells is
(A) parenchyma
(B) collenchyma
(C) Sclerenchyma
(D) xylem

42. A permanent plant tissue made up of living cell having thickening at the corners is
A) Sclerenchyma
(B) collenchyma
(C) parenchyma
(D) phloem

43. The main function of Sclerenchyma is to help in the
(A) conduction of food
(B) synthesis of food
(C) exchange of gases
(D) mechanical support

44. The wall of cork cells are thickened by the deposition of
(A) cutin
(B) suberin
(C) lignin
(D) pectin

45. The wax like substance present in the cell wall of onion skin is
(A) pectin
(B) lignin
(C) cellulose
(D) suberin

46. The outer wall of epidermis in stems and leaves has a waxy covering made up of
(A) lignin
(B) suberin
(C) pectin
(D) cutin

47. Collenchyma differs from Sclerenchyma in
(A) retaining cytoplasm at maturity
(B) having thick walls
(C) having a wide lumen
(D) being Meristematic

48. Lignified elongated bead cells are
(A) parenchyma
(B) collenchyma
(C) sclerenchyma
(D) Epidermis

49. Which of the following plant tissue lacks protoplasm at maturity ?
(A) Sclerenchyma
(B) Collenchyma
(C) parenchyma
(D) Epidermis

50. In plants phloem tissues perform the function of
(A) conduction of water
(B) conduction of food
(C) photosynthesis
(D) mechanical support




BY 
ARANBIR SINGH

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MCQ OF CONTROL & CO-ORDINATION CLASS X

CONTROL &  CO-ORDINATION

CLASS: X

1. Phytohormones are
(A) hormones regulating growth from seed to adulthood
(B) hormones regulating secondary growth
(C) growth regulators synthesized by plants and influencing physiological processes
(D) hormones regulating flowering.

2. The natural plant hormones were first isolated from
(A) cotton fruits, spinach leaves, rice plant (B) avena coleoptiles, fungus gibberella
(C) corn germ oil, human urine (D) human urine, rice plant.

3. If the tip of a seeding is cut off, growth as well as bending ceases because it hampers
(A) perception of light stimulus (B) transpiration
(C) respiration (D) photosynthesis.

4. A plant bends towards the source of light when exposed to the light on only one side. Which of the
following is the best explanation of the phenomena ?
(A) It needs light for photosynthesis
(B) The apices of their stems are attracted by light
(C) Some auxin accumulates on the shaded side to induce greater cell elongation on that side
(D) Light stimulates the cells on the illuminated side to increase in length

5. The movement of plant organs in response to the force of gravity is called
(A) hydrotropism (B) geotropism (C) heliotropism (D) phototropism

6. A high concentration of synthetic auxins is generally used for
(A) wee control (B) preventing the growth of the lateral buds.
(C) controlling of cell enlargement (D) enhancing root initiation

7. Gibberellic acid has been  employed to induce flowering
(A) long day conditions for  short day plants   (B) for some plants
(C) short day conditions for  in long day plants  (D) none of these

8. Cytokinins are known to
(A) inhibit cytoplamic movement (C) help in retention of chlorophyll
(C) influence water movement (D) promote abscission layer formation

9. Ethylene is a
(A) solid hormone (B) gaseous enzyme (C) gaseous hormone (D) liquid gas mixture

10. Pineapple an be made to flower if off season by
(A) zeatin (B) ethylene (C) temperature (D) short days

11. The effect of daily light period on flowering is called
(A) photooxidation (B) phototropism (C) photoperiodism (D) photorespiration

12. Brain stem is formed by the union of
(A) optic lobes (B) cerebellum with optic lobes
(C) corpora striate (D) mid brain, ponsvarolli and medulla oblongata

13. Number of spinal nerves in man are
(A) 11 pairs (B) 13 pairs (C) 6 pairs (D) 31 pairs

14. Third ventricle occurs in
(A) cerebrum (B) cerebellum (C) medulla oblongata  (D)  All of these  (E) none of these

15. The pineal body is considered as
(A) an endocrine gland (B) an organ concerned with voluntary actions
(C) an organ concerned with vision (D) a vestige of third eye and endocrine gland

16. Part of brain involved in interpretation, storage of information and initiation of response on the basis of
past experience is
(A) motor area (B) cerebellum (C) sensory area (D) association area

17. Autonomic nervous system controls
(A) reflex action (B) sense organs (C) internal organs (D) skeletal muscle

18. The study of nervous system and its disorders is called
(A) neurogenesis (B) hematology (C) neuroglia (D) neurology

19. The sensation of sight in human brain is perceived by
(A) optic lobe (B) occipital lobe (C) frontal lobe (D) parietal lobe

BY
ARANBIR SINGH

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