NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1883 - 1887 of 2184

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Question number: 1883

» Experimental Skills » Transistor

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MCQ▾

Question

The transfer characteristics of a transistor means a plot of

Choices

Choice (4) Response

a.

input voltage versus input current

b.

input current versus output current.

c.

output voltage versus input voltage

d.

output voltage versus output current.

Question number: 1884

» Communication System » Bandwidth of Transmission Medium

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MCQ▾

Question

In a communication system, noise is most likely to affect the signal

Choices

Choice (4) Response

a.

In the information source I

b.

At the transmitter

c.

In the channel or in the transmission line

d.

None of the above

Question number: 1885

» Gravitation » Orbital Velocity of a Satellite

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Assertion-Reason▾

Question

Assertion (Ꭺ)

The speed of revolution of an artificial satellite revolving very near the earth is 8 kms -1.

Reason (Ꭱ)

Orbital velocity of a satellite, become independent of height of near satellite.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

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

d.

Ꭺ is true but Ꭱ is false

Question number: 1886

» Oscillations and Waves » Beats

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MCQ▾

Question

A source of sound of frequency 233 Hz is moving rapidly towards a wall with a velocity of 3.5 m/s. The speed of sound is 330 m/s. If the observer is between the wall and the source, then the beats heard per second will be,

Choices

Choice (4) Response

a.

4.2 Hz

b.

Zero

c.

5.3 Hz

d.

4.9 Hz

Question number: 1887

» Gravitation » Escape Velocity

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MCQ▾

Question

Acceleration due to gravity on a planet is 10 times the value on the earth. Escape velocity for the planet and the earth are V p and V e respectively. Assuming that the radii of the planet and the earth are the same, then –

Choices

Choice (4) Response

a.

b.

c.

d.