NEET Physics: Questions 1933 - 1938 of 2099

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Question number: 1933

» Experimental Skills » Meter Bridge

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

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.

6.05 Å

b.

1.21 Å

c.

2.42 Å

d.

3.63 Å

Question number: 1935

» Communication System » Basic Elements of Communication System

MCQ▾

Question

A laser is a coherent source because it contains,

Choices

Choice (4) Response
a.

Coordinated wave of many wavelengths

b.

Uncoordinated wave of a particular wavelength

c.

Many wavelengths

d.

Coordinated waves of a particular wavelength

Question number: 1936

» Communication System » Basic Elements of Communication System

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. All of the above

Question number: 1937

» Gravitation » Kepler's Laws of Planetary Motion

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.

3.9 years

b.

1.9 years

c.

1.2 years

d.

3.2 years

Question number: 1938

» Gravitation » Escape Velocity

MCQ▾

Question

Ve and Vp 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) Ve=Vp

(2) Ve=2Vp

(3) Ve=Vp4

(4) Ve=Vp2

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 4 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

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