NDA 2018 Paper 2 | Physics Question 146 | General Science

NDA 2018 Paper 2

MCQ (Single Correct Answer)

+2.5

-0.83

A circular coil of radius R having N number of turns carries a steady current I. The magnetic induction at the centre of the coil is 0.1 T. If the number of turns is doubled and the radius is halved, then which one of the following will be the correct value for the magnetic induction at the centre of the coil?

0.05 T

0.2 T

0.4 T

0.8 T

NDA 2018 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

Which one of the following statement 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.

NDA 2018 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

If T is the time period of an oscillating pendulum, then which one of the following statement 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.

NDA 2018 Paper 1

MCQ (Single Correct Answer)

+2.5

-0.83

If an object moves with constant velocity, then which one of the following statement 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.

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