Lakshya Education MCQs

Question: Magnetism at the centre of a bar magnet is
Options:
A.minimum
B.maximum
C.zero
D.minimum or maximum
Answer: Option C

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Question 1. It is more difficult to walk on a sandy road than on a concrete road because
  1.    sand is soft and concreter is hard.
  2.    the friction between sand and feet is less than that between concrete and feet.
  3.    the friction between sand and feet is more than that between concrete and feet.
  4.    the sand is grainy but concrete is smooth.
Answer: Option B
Question 2. Of the following properties of a wave, the one that is independent of the other is its
  1.    amplitude
  2.    velocity
  3.    wavelength
  4.    frequency
Answer: Option A
Question 3. 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
  1.    0.14 m/s
  2.    140 m/s
  3.    1.4 km/s
  4.    14 m/s
Answer: Option D
Question 4. Sound waves in air are
  1.    transverse
  2.    longitudinal
  3.    electromagnetic
  4.    polarised
Answer: Option B
Question 5. Out of the following, which is not emitted by radioactive substance?
  1.    Electrons
  2.    Electromagnetic radiations
  3.    Alpha particles
  4.    Neutrons
Answer: Option D
Question 6. Rectifiers are used to convert:
  1.    Direct current to Alternating current
  2.    Alternating current to Direct current
  3.    High voltage to low voltage
  4.    Low voltage to high voltage
Answer: Option B

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