AIIMS Physics: Questions 295 - 298 of 500

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Question number: 295

» Work, Energy and Power » Elastic and Inelastic Collisions

MCQ▾

Question

A wire suspended vertically from one end is stretched by attaching a weight of x to the lower end. The weight stretches the wire by 2 mm. If the elastic energy stored in the wire is 0.4 J, what is the value of x ?

Choices

Choice (4) Response

a.

400 N

b.

100 N

c.

600 N

d.

250 N

Question number: 296

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Two rings of the same mass of 5 kg and radius 2 m are placed such that their centers are at a common point and their planes are perpendicular to each other. The moment of inertia of the system about an axis passing through the centre and perpendicular to the plane of one of the rings is –

Choices

Choice (4) Response

a.

30kgm2

b.

120kgm2

c.

20kgm2

d.

60kgm2

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 α . 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 α .

b.

Maximum for α=900

c.

Maximum for α=300

d.

Maximum for α=00

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

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