# Oscillations and Waves (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 25 - 27 of 27

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## Question number: 25

» Oscillations and Waves » Periodic Functions

MCQ▾

### Question

A mass M is suspended from a spring of negligible mass. The spring is pilled a little and then released so that the mass executes SHM of time period T. If the mass is increased by m, the time period becomes. Then the ratio of is:

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 26

» Oscillations and Waves » Harmonics

MCQ▾

### Question

A wire with linear density of 0.005 kg/m is stretched between two rigid supports. Tension on the wire is 450 N. The wire resonates at 320 Hz. The next frequency at which wire resonates is 360 Hz. The length of the wire is –

### Choices

Choice (4) Response

a.

3.75 m

b.

2.0 m

c.

3.0 m

d.

3.25 m

## Question number: 27

» Oscillations and Waves » Speed of a Wave

Appeared in Year: 2016

MCQ▾

### Question

A hearing test is conducted on an aged person. It is found that her threshold of hearing is 20 decibels at and it rises linearly with frequency to decibels at . The minimum intensity of sound that the person can hear at is –

### Choices

Choice (4) Response

a.

times than that at

b.

times than that at

c.

times than that at

d.

times than that at

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