NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1925 - 1930 of 2142

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Question number: 1925

» Oscillations and Waves » Standing Waves in Strings and Organ Pipes

MCQ▾

Question

A closed organ pipe of length L and an open organ pipe contain gases of densities ρ 1, and ρ 2 respectively. The compressibility of gases are equal in both the pipes. Both the pipes are vibrating in their first overtone with same frequency. The length of the open organ pipe is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1926

» Communication System » Amplitude and Frequency Modulation

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.

100 cycles/sec

b.

10 cycles/sec

c.

1000 cycles/sec

d.

10000 cycles/sec

Question number: 1927

» Oscillations and Waves » Doppler Effect in Sound

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.

90 Hz

b.

91 Hz

c.

100 Hz

d.

110 Hz

Question number: 1928

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

Gravitational mass is proportional to,

Choices

Choice (4) Response

a.

Gravitational field

b.

Gravitational force

c.

Gravitational intensity

d.

Question does not provide sufficient data or is vague

Question number: 1929

» Oscillations and Waves » Doppler Effect in Sound

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.

409

b.

517

c.

429

d.

500

Question number: 1930

» Gravitation » Geo-Stationary Satellites

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.

4.56 ⨯ 10 5

c.

1

d.

5.93 ⨯ 10 5

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