Which one of the following statements is correct? from General K

Subject

General Knowledge

Class

NDA Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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1.

Which one of the following statements is correct?

  • Any energy transfer that does not involve temperature difference in some way is not heat.

  • Any energy transfer always requires a temperature difference.

  • On heating the length and volume of the object remain exactly the same.

  • Whenever there is a temperature difference, heat is the only way of energy transfer.


A.

Any energy transfer that does not involve temperature difference in some way is not heat.


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2.

If T is the time period of an oscillating pendulum, which one of the following statements is NOT correct?

  • The motion repeats after time T only once

  • T is the least time after which motion repeats itself

  • The motion repeats itself after nT, where n is a positive integer

  • T remains the same only for small angular displacements


3.

If an object moves with constant velocity, then which one of the following statements is NOT correct?

  • Its motion is along a straight line

  • Its speed changes with time

  • Its acceleration is zero

  • Its displacement increases linearly with time


4.

An object is moving with uniform acceleration a. Its initial velocity is u and after time t its velocity is v. The equation of its motion is v = u + at. The velocity (along y-axis) time (along x-axis) graph shall be a straight line

  • passing through origin

  • with x-intercept u

  • with y-intercept u

  • with slope u


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5.

What is the net force experienced by a bar magnet plated in a uniform magnetic field?

  • Zero

  • Depends upon length of the magnet

  • Never zero

  • Depends upon temperature


6.

Which one of the following has maximum inertia?

  • An atom

  • A molecule

  • A one-rupee coin

  • A cricket ball


7.

Which one of the following is the value of 1 kWh of energy converted into joules?

  • 1.8 x 106 J

  • 3.6 x 106 J

  • 6.0 x 106 J

  • 7.2 x 106 J


8.

Which one of the following statements about gravitational force is NOT correct?

  • It is experienced by all bodies in the universe

  • It is a dominant force between celestial bodies

  • It is a negligible force for atoms

  • It is same for all pairs of bodies in our universe


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9.

Whether an object will float or sink in a liquid, depends on

  • mass of the object only

  • mass of the object and density of liquid only

  • difference in the densities of the object and liquid

  • mass and shape of the object only


10.

Which one of the following devices is non-ohmic?

  • Conducting copper coil

  • Electric heating coil

  • Semi conductor diode

  • Rheostat


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