NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1933 - 1938 of 2184

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Question number: 1933

» Experimental Skills » Meter Bridge

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MCQ▾

Question

A meter-bridge is based on the principle of

Choices

Choice (4) Response

a.

Wheatstone bridge

b.

Variation of resistance with temperature

c.

Galvanometer

d.

None of the above

Question number: 1934

» Oscillations and Waves » Harmonics

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MCQ▾

Question

A standing wave having 3 nodes and 2 antinodes is formed between two atoms having a distance 1.21 A between them. The wavelength of the standing wave is

Choices

Choice (4) Response

a.

3.63 Å

b.

2.42 Å

c.

1.21 Å

d.

6.05 Å

Question number: 1935

» Communication System » Basic Elements of Communication System

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MCQ▾

Question

A laser is a coherent source because it contains,

Choices

Choice (4) Response

a.

Coordinated wave of many wavelengths

b.

Many wavelengths

c.

Coordinated waves of a particular wavelength

d.

Uncoordinated wave of a particular wavelength

Question number: 1936

» Communication System » Basic Elements of Communication System

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MCQ▾

Question

An antenna is a device,

Choices

Choice (4) Response

a.

That converts electromagnetic energy into radio frequency signal.

b.

That converts guided electromagnetic waves into free space electromagnetic waves and vice-versa.

c.

That converts radio frequency signal into electromagnetic energy.

d.

None of the above

Question number: 1937

» Gravitation » Kepler's Laws of Planetary Motion

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MCQ▾

Question

The semi-major axes of the orbits of mercury and mars are respectively 0.387 and 1.524 in astronomical unit. If the period of Mercury is 0.241 year, what is the period of Mars?

Choices

Choice (4) Response

a.

3.2 years

b.

1.2 years

c.

1.9 years

d.

3.9 years

Question number: 1938

» Gravitation » Escape Velocity

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MCQ▾

Question

and denotes the escape velocity from the earth and another planet having twice the radius and the same mean density as the earth. Then which of the following is (are) wrong?

(1)

(2)

(3)

(4)

Select the correct answers with mark it according to the following codes:

Choices

Choice (4) Response

a.

1.2 and 3 are correct

b.

1 and 3 are correct

c.

1 and 4 are correct

d.

1 and 2 are correct