NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1844 - 1848 of 2184

Access detailed explanations (illustrated with images and videos) to 2184 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

Question number: 1844

» Communication System » Basic Elements of Communication System

Edit
MCQ▾

Question

The phenomenon by which light travels in an optical fibers

Choices

Choice (4) Response

a.

Total internal reflection

b.

Transmission

c.

Re-reflection

d.

Refraction

Question number: 1845

» Gravitation » Orbital Velocity of a Satellite

Edit
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.

b.

c.

d.

Question number: 1846

» Oscillations and Waves » Doppler Effect in Sound

Edit
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.

192

c.

300

d.

200

Question number: 1847

» Gravitation » Kepler's Laws of Planetary Motion

Edit
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.

4.242

b.

5.242

c.

2.242

d.

4.641

Question number: 1848

» Experimental Skills » Potentiometer

Edit
MCQ▾

Question

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

Choices

Choice (4) Response

a.

By decreasing the current through it.

b.

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

c.

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

d.

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