AIIMS Physics: Questions 285 - 288 of 500

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Question number: 285

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

A bullet when fired at a target with a velocity of 150ms1 , penetrates 4.5 meter into it. If the bullet is fired with the same velocity at a similar target with a thickness 0.5 meter, then it will emerge from it with a velocity of –

Choices

Choice (4) Response

a.

1002ms

b.

100ms

c.

1002ms

d.

100ms

Question number: 286

» Electrostatics » Capacitors

MCQ▾

Question

A 50µF capacitor in a defibrillator is charged to 2000 V. The energy stored in the capacitor is sent through the patient during a pulse of duration 4 ms. The power delivered to the patient is –

Choices

Choice (4) Response

a.

100 kW

b.

25 kW

c.

50 kW

d.

200 kW

Question number: 287

» Magnetic Effects of Current and Magnetism » Biot - Savart Law

MCQ▾

Question

A closely wound flat circular coil of 30 turns of wire has diameter of 12 cm and carries a current of 6 ampere. Determine the magnetic flux density at the centre of the coil:

Choices

Choice (4) Response

a.

2.0×104T

b.

0.9×103T

c.

2.9×104T

d.

1.9×103T

Question number: 288

» Oscillations and Waves » Periodic Motion - Period Frequency

MCQ▾

Question

At a certain instant of time, displacement of a harmonically oscillating body is +0.02m and acceleration is 8.0ms and amplitude is 0.08 m. So what is the velocity of the oscillator at this instant of time?

Choices

Choice (4) Response

a.

1.55ms

b.

2.05ms

c.

1.0ms

d.

2.5ms

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