NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1927 - 1932 of 2184

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Question number: 1927

» Communication System » Amplitude and Frequency Modulation

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MCQ▾

Question

In an amplitude modulated wave for audio frequency of 1000 cycle/second, the appropriate carrier frequency will be,

Choices

Choice (4) Response

a.

10000 cycles/sec

b.

1000 cycles/sec

c.

10 cycles/sec

d.

100 cycles/sec

Question number: 1928

» Oscillations and Waves » Doppler Effect in Sound

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MCQ▾

Question

An observer is moving away from source of sound of frequency 100 Hz. His speed is 33 m/s. If speed of sound is 330 m/s, then the observed frequency is

Choices

Choice (4) Response

a.

100 Hz

b.

110 Hz

c.

90 Hz

d.

91 Hz

Question number: 1929

» Gravitation » Universal Law of Gravitation

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MCQ▾

Question

Gravitational mass is proportional to,

Choices

Choice (4) Response

a.

Gravitational intensity

b.

Gravitational field

c.

Gravitational force

d.

All of the above

Question number: 1930

» Oscillations and Waves » Doppler Effect in Sound

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MCQ▾

Question

A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s. The frequency heard by the observer in Hz is

Choices

Choice (4) Response

a.

500

b.

517

c.

409

d.

429

Question number: 1931

» Gravitation » Geo-Stationary Satellites

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MCQ▾

Question

If the moon revolves round the earth 10 times in one year. If the ratio of sun-earth distance to earth-moon distance is 393, then the ratio of masses of sun and earth will be –

Choices

Choice (4) Response

a.

6.07 ⨯ 10 5

b.

5.93 ⨯ 10 5

c.

1

d.

4.56 ⨯ 10 5

Question number: 1932

» Gravitation » Gravitational Potential

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MCQ▾

Question

Two satellites S 1 and S 2 revolve round a planet in the same direction in circular orbits. Their periods of revolutions are 1 hour and 8 hour respectively. The radius of S 1 is 10 4 km. The velocity of S 2 with respect to S 1 will be

Choices

Choice (4) Response

a.

b.

c.

d.