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AIIMS (All India Institute of Medical Sciences) Physics: Questions 298 - 304 of 500

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Question 298

Question

MCQ▾

In an A. C. circuit containing only inductor, the voltage –

Choices

Choice (4)Response

a.

Leads the current by 180°

b.

Leads the current by 90°

c.

Lags the current by 90°

d.

Remains in phase with the voltage

Question 299

Question

MCQ▾

The speed of sound in a gas at S. T. P. is and the density of the gas is . Find the number of degrees of freedom of a molecule of the gas.

Choices

Choice (4)Response

a.

3

b.

6

c.

5

d.

4

Question 300

Question

MCQ▾

Two bodies with kinetic energies in the ratio of are moving with equal linear momentum. The ratio of their masses is –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 301

Question

MCQ▾

A radioactive substance decays to of its initial activity in 20 days. The half-life of the radioactive substance expressed in days is –

Choices

Choice (4)Response

a.

8

b.

12

c.

2

d.

6

Question 302

Question

MCQ▾

For sky wave propagation of a 18 MHz signal, what should be the minimum electron density in ionosphere –

Choices

Choice (4)Response

a.

b.

c.

d.

Question 303

Question

MCQ▾

A bullet loses of its velocity when it passes through a plank. Find the maximum number of planks through which it can pass.

Choices

Choice (4)Response

a.

9

b.

10

c.

3

d.

5

Question 304

Question

MCQ▾

A boy standing on a long rail road car throws a ball up (straight) with a velocity . The car is moving on the horizontal road with acceleration 3 , How far behind the boy will the ball fall?

Choices

Choice (4)Response

a.

8m

b.

48 m

c.

12m

d.

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