NEET Physics: Questions 1843 - 1847 of 2098

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 1843

» Communication System » Basic Elements of Communication System

MCQ▾

Question

The phenomenon by which light travels in an optical fibers

Choices

Choice (4) Response

a.

Transmission

b.

Total internal reflection

c.

Refraction

d.

Re-reflection

Question number: 1844

» Gravitation » Orbital Velocity of a Satellite

MCQ▾

Question

A satellite has to revolve round the earth in a circular orbit of radius 8 ⨯ 10 3 km. The velocity of projection of the satellite in this orbit will be -

Choices

Choice (4) Response

a.

16.2kmsec

b.

3.78kmsec

c.

7.08kmsec

d.

8.0kmsec

Question number: 1845

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A whistle sends out 256 waves in a second. If the whistle approaches the observer with velocity 1/3 of the velocity of sound in air, the number of waves per second the observer will receive,

Choices

Choice (4) Response

a.

384

b.

300

c.

200

d.

192

Question number: 1846

» Gravitation » Kepler's Laws of Planetary Motion

MCQ▾

Question

The Jupiter s period of revolution round the Sun is 10 times that of the Earth. Assuming the planetary orbits are circular, how many times the distance between the Jupiter and Sun exceeds that between the Earth and the sun.

Choices

Choice (4) Response

a.

5.242

b.

2.242

c.

4.641

d.

4.242

Question number: 1847

» Experimental Skills » Potentiometer

MCQ▾

Question

The potential gradient of a potentiometer can be increased by which of the following operation?

Choices

Choice (4) Response

a.

By increasing the area of cross-section of potentiometer wire.

b.

By decreasing the current through it.

c.

By using a wire of material of low specific resistance. when A is decreased, k will increase.

d.

By decreasing the area of cross-section of the potentiometer wire.

Sign In