NEET Physics: Questions 1826 - 1830 of 2098

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Question number: 1826

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

If the satellite is stopped suddenly in its orbit which is at a distance = radius of earth from earth’s surface and allowed to fall freely into the earth, the speed with which it hits the surface of earth will be -

Choices

Choice (4) Response

a.

7.919msec

b.

11.2kmsec

c.

7.919kmsec

d.

11.2msec

Question number: 1827

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A police car moving at 22 m/s, chases a motorcyclist. The police man sounds his horn at 180 Hz, while both of them move towards a stationary siren of frequency 162 Hz. Calculate the speed of the motorcycle, if it is given that he does not observes any beats

Choices

Choice (4) Response

a.

33 m/s

b.

22 m/s

c.

Zero

d.

28.7 m/s

Question number: 1828

» Experimental Skills » Diode Identification

MCQ▾

Question

An LED operates under which biasing condition?

Choices

Choice (4) Response

a.

Reverse bias

b.

Forward bias

c.

Can operate both in forward and reverse bias

d.

All of the above

Question number: 1829

» Gravitation » Escape Velocity

MCQ▾

Question

The ratio of the radius of the Earth to that of the moon is 10. The ratio of g on earth to the moon is 6. The ratio of the escape velocity from the earth’s surface to that from the moon is approximately –

Choices

Choice (4) Response

a.

8

b.

2

c.

4

d.

10

Question number: 1830

» Experimental Skills » Meter Bridge

MCQ▾

Question

To calculate an unknown resistance with the help of a meter bridge why is it advised to change the gap with the known and unknown resistance?

Choices

Choice (4) Response

a.

To eliminate the resistance of the gap.

b.

To eliminate the resistance of the connecting wire and copper strip

c.

To include the resistance of the connecting wire and copper strip

d.

To balance the known and unknown resistance.

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