AIIMS Physics: Questions 332 - 336 of 500

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Question number: 332

» Oscillations and Waves » Speed of a Wave

MCQ▾

Question

The tension in a piano wire is 20N. What should be the tension in the wire to produce a note of three times of the frequency?

Choices

Choice (4) Response

a.

110N

b.

120N

c.

180N

d.

140N

Question number: 333

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

Assertion-Reason▾

Assertion (Ꭺ)

The flash of lighting is seen before the sound of thunder is heard.

Reason (Ꭱ)

Speed of sound is greater than speed of light.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 334

» Kinematics » Scalars and Vectors » Scalar and Vector Products

MCQ▾

Question

A force of (2i^+6j^) newton acts on a body and displaces it by (4i^+8j^) meter. The work done by the force is:

Choices

Choice (4) Response

a.

49 J

b.

120 J

c.

72 J

d.

56 J

Question number: 335

» Oscillations and Waves » Harmonics

MCQ▾

Question

Two sounds in a gas differ in their loudness level by 40 db. What is the ratio of the amplitude of the pressure oscillations?

Choices

Choice (4) Response

a.

10:1

b.

100:1

c.

104:1

d.

10:1

Question number: 336

» 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.

1002ms

c.

100ms

d.

All of the above

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