Oscillations and Waves-Speed of a Wave (AIIMS Physics): Questions 1 - 5 of 7

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Question number: 1

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

MCQ▾

Question

A string in a musical instrument is 50 cm long and its fundamental frequency is 800 Hz. If a frequency of 1000 Hz is to be produced, then required length of string is –

Choices

Choice (4) Response
a.

20 cm/s

b.

200 cm/s

c.

100 cm/s

d.

50 cm/s

Question number: 2

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2001

MCQ▾

Question

The tension in a piano wire is 10N. What should be the tension in the wire to produce a note of double the frequency?

Choices

Choice (4) Response
a.

20N

b.

40N

c.

80N

d.

10N

Question number: 3

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2002

MCQ▾

Question

The velocities of sound at the same pressure in two monatomic gases of densities ρ1 and ρ2 are V1 and V2 respectively. If ρ1ρ2=4 , then the value of V1V2 is?

Choices

Choice (4) Response
a.

2

b.

14

c.

4

d.

12

Question number: 4

» 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: 5

» 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

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