Oscillations and Waves (KVPY Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 19 - 22 of 27

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Question number: 19

» Oscillations and Waves » Free Forced and Damped Oscillations

MCQ▾

Question

If an oscillator completes 200 oscillations, its amplitude decreases to 14 of its initial value. When it completes 400 oscillations, the amplitude will be –

Choices

Choice (4) Response

a.

16

b.

116

c.

18

d.

43

Question number: 20

» Oscillations and Waves » Wave Motion

Appeared in Year: 2015

MCQ▾

Question

The intensity of sound during the festival season increased by 100 times. This could imply a decibel level rise from,

Choices

Choice (4) Response

a.

20to120dB

b.

70to72dB

c.

100to10, 000dB

d.

80to100dB

Question number: 21

» Oscillations and Waves » Harmonics

MCQ▾

Question

A wire with linear density of 0.006kgm is stretched between two rigid supports. Tension on the wire is 540 N. The wire resonates at 450 Hz. The next frequency at which wire resonates is 540 Hz. The length of the wire is –

Choices

Choice (4) Response

a.

3.5m

b.

2.75m

c.

1.67m

d.

2.12m

Question number: 22

» Oscillations and Waves » Periodic Functions

Appeared in Year: 2013

MCQ▾

Question

A ball is rolling without slipping in a spherical shallow bowl (radius R) as shown in the figure and is executing simple harmonic motion. If the radius of the ball is doubled, the period of oscillation,

 A ball is rolling without slipping in a spherical shallow bowl

a Ball Is Rolling Without Slipping in a Spherical Shallow Bowl

In figure a ball is rolling without slipping in a spherical shallow bowl is shown.

Choices

Choice (4) Response

a.

Decreases slightly

b.

Is increased by a factor of 2

c.

Increases slightly

d.

Is reduced by a factor of 12

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