NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1924 - 1926 of 2184

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Question number: 1924

» Gravitation » Universal Law of Gravitation

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MCQ▾

Question

An artificial satellite of the earth is to be established in the equatorial plane of the earth and to an observer at the equator it is required that the satellite will move eastward, completing one round trip per day. The distance of the satellite from the center of the earth will be- (The mass of the earth is 6.00 ⨯ 10 24 kg and its angular velocity = 7.30 ⨯ 10 -5 rad/sec)

Choices

Choice (4) Response

a.

2.66 ⨯ 10 7 m.

b.

2.66 ⨯ 10 5 m.

c.

2.66 ⨯ 10 3 m.

d.

2.66 ⨯ 10 6 m.

Question number: 1925

» Communication System » Propagation of Electromagnetic Waves in the Atmosphere

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Assertion-Reason▾

Question

Assertion (Ꭺ)

The electromagnetic waves of shorter wavelength can travel longer distances on earth’s surface than those of longer wavelengths.

Reason (Ꭱ)

Shorter the wavelength, the larger is the velocity of wave propagation.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

Question number: 1926

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

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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.