AIIMS Physics: Questions 297 - 301 of 500

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Question number: 297

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

A V – shape is created by joining two same sized roads. The angle between two rods is Equation . If this system is rotating about a line passing through their ends which are joined and perpendicular to their plane, then the work done (W) is –

Choices

Choice (4) Response

a.

W is independent of Equation .

b.

Maximum for Equation

c.

Maximum for Equation

d.

Maximum for Equation

Question number: 298

» Electromagnetic Induction & Alternating Currents » Alternating Currents

MCQ▾

Question

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 number: 299

» Experimental Skills » Speed of Sound in Air

MCQ▾

Question

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

Choices

Choice (4) Response

a.

6

b.

5

c.

3

d.

4

Question number: 300

» Work, Energy and Power » Kinetic Energy

MCQ▾

Question

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

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation Equation

d.

Equation

Question number: 301

» Atoms and Nuclei » Half Life and Mean Life

MCQ▾

Question

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

Choices

Choice (4) Response

a.

2

b.

6

c.

8

d.

12

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