AIIMS Physics: Questions 327 - 331 of 500

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Question number: 327

» Magnetic Effects of Current and Magnetism » Magnet Oscillations

MCQ▾

Question

A magnet makes 30 oscillations per minute at a place having magnetic field of 0.2×105T . At another place, it takes 1.5 sec to complete one vibration. The value of earth’s horizontal field at that place is:

Choices

Choice (4) Response

a.

0.422×106T

b.

1.2×106T

c.

0.560×106T

d.

0.355×106T

Question number: 328

» Wave Optics » Interference

MCQ▾

Question

The ratio of intensities of two waves is 16: 1. When they superimpose, the ratio of maximum to minimum intensity will become –

Choices

Choice (4) Response

a.

9: 25

b.

25: 9

c.

4: 1

d.

1: 16

Question number: 329

» Work, Energy and Power » Work-Energy Theorem

MCQ▾

Question

A block of mass 20 kg is moving in x-direction with a constant speed of 10ms . It is subjected to a retarding force F=0.2xjoulesmeter during its travel from x=10meters to x=30meters . Its final kinetic energy will be –

Choices

Choice (4) Response

a.

500 joules

b.

850 joules

c.

750 joules

d.

920 joules

Question number: 330

» Ray Optics » Snell's Law

MCQ▾

Question

Velocity of light in a liquid is 1.5×108ms1 and in air, it is 3×108ms1 . If a ray of light passes from this liquid into air, the critical angle will be –

Choices

Choice (4) Response

a.

600

b.

300

c.

450

d.

Question does not provide sufficient data or is vague

Question number: 331

» Electromagnetic Induction & Alternating Currents » Induced EMF and Current

Appeared in Year: 1997

MCQ▾

Question

A coil of copper having 900 turns is placed in a magnetic field (B=3×103T) perpendicular to its plane. The cross sectional area of the coil is 0.5 m2. If it turns through 180° in 0.02 sec, then the induced emf in the coil is –

Choices

Choice (4) Response

a.

135 V

b.

35 V

c.

0.4 V

d.

0.2 V

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