NEET Physics: Questions 1909 - 1913 of 2098

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Question number: 1909

» Experimental Skills » Transistor

MCQ▾

Question

Current gain is maximum in which of the following configuration of a transistor?

Choices

Choice (4) Response

a.

Common base configuration

b.

Common collector configuration

c.

Common emitter configuration

d.

Equal in both common emitter and common base configuration

Question number: 1910

» Oscillations and Waves » Beats

MCQ▾

Question

Two sirens situated one kilometer apart are producing sound of frequency 330 Hz. An observer starts moving from one siren to the other with a speed of 2 m/s. If the speed of sound be 330 m/s, what will be the beat frequency heard by the observed

Choices

Choice (4) Response

a.

8

b.

6

c.

4

d.

1

Question number: 1911

» Experimental Skills » Prism

MCQ▾

Question

The refractive index of the material of a prism does not depend on which of the following factor?

Choices

Choice (4) Response

a.

Temperature

b.

Nature of the material

c.

Wavelength or colour of light

d.

Angle of the prism.

Question number: 1912

» Oscillations and Waves » Beats

MCQ▾

Question

A person carrying a whistle emitting continuously a note of 272 Hz is running towards a reflecting surface with a speed of 18 km/hour. The speed of sound in air is 345ms -1. The number of beats heard by him is,

Choices

Choice (4) Response

a.

8

b.

3

c.

4

d.

6

Question number: 1913

» Oscillations and Waves » Resonance

MCQ▾

Question

If in an experiment for determination of velocity of sound by resonance tube method using a tuning fork of 512 Hz, first resonance was observed at 30.7 cm and second was obtained at 63.2 cm, then maximum possible error in velocity of sound is (consider actual speed of sound in air is 332 m/s)

Choices

Choice (4) Response

a.

58 cm/sec

b.

80 cm/sec

c.

204 cm/sec

d.

110 cm/sec

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