Physics MCQs with answers Page - 6

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Q. Sound waves in air are

  • (A) transverse
  • (B) longitudinal
  • (C) electromagnetic
  • (D) polarised

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Q. Magnetism at the centre of a bar magnet is

  • (A) minimum
  • (B) maximum
  • (C) minimum or maximum
  • (D) zero

A

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Q. It is more difficult to walk on a sandy road than on a concrete road because

  • (A) sand is soft and concreter is hard.
  • (B) the friction between sand and feet is less than that between concrete and feet.
  • (C) the friction between sand and feet is more than that between concrete and feet.
  • (D) the sand is grainy but concrete is smooth.

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Q. Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

  • (A) 0.14 m/s
  • (B) 140 m/s
  • (C) 1.4 km/s
  • (D) 14 m/s

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Q. Of the following properties of a wave, the one that is independent of the other is its

  • (A) amplitude
  • (B) velocity
  • (C) wavelength
  • (D) frequency

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Q. Lux is the SI unit of

  • (A) intensity of illumination
  • (B) luminous efficiency
  • (C) luminous flux
  • (D) luminous intensity

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Q. On a rainy day, small oil films on water show brilliant colours. This is due to

  • (A) dispersion
  • (B) interference
  • (C) diffraction
  • (D) polarization

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Q. Point A is at a lower electrical potential than point B. An electron between them on the line joining them will

  • (A) Move towards A
  • (B) Move towards B
  • (C) Move at right angles to the line joining A and B
  • (D) Remain at rest

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Q. Materials for rain-proof coats and tents owe their water-proof properties to

  • (A) surface tension
  • (B) viscosity
  • (C) specific gravity
  • (D) elasticity

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Q. The image formed in a compound microscope is

  • (A) erect
  • (B) inverted
  • (C) sometimes erect, sometimes inverted
  • (D) none

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