NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1856 - 1860 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: 1856

» Oscillations and Waves » Doppler Effect in Sound

Edit
MCQ▾

Question

A source of sound of frequency n is moving towards a stationary observer with a speed S. If the speed of sound in air is V and the frequency heard by the observer is n 1, the value of is,

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1857

» Communication System » Amplitude and Frequency Modulation

Edit
MCQ▾

Question

In frequency modulation

Choices

Choice (4) Response

a.

The frequency of modulated wave varies as amplitude of modulating wave

b.

The amplitude of modulated wave varies as amplitude of carrier wave

c.

The amplitude of modulated wave varies as frequency of carrier wave

d.

The frequency of modulated wave varies as frequency of modulating wave

Question number: 1858

» Communication System » Sky and Space Wave Propagation

Edit
MCQ▾

Question

Maximum usable frequency (MUF) in F-region layer is x, when the critical frequency is 60 MHz and the angle of incidence is 70°. Then x is (cos 70° = 0.34)

Choices

Choice (4) Response

a.

190 MHz

b.

170 MHz

c.

175 MHz

d.

150 MHz

Question number: 1859

» Gravitation » Gravitational Potential

Edit
Assertion-Reason▾

Question

Assertion (Ꭺ)

Gravitational potential of earth at every place on it is negative.

Reason (Ꭱ)

Everybody on earth is bound by the attraction of earth.

Choices

Choice (4) Response

a.

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

b.

Both Ꭺ and Ꭱ are false

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

Question number: 1860

» Gravitation » Gravitational Acceleration

Edit
MCQ▾

Question

Two planets of radii in the ratio 1: 2 are made from the materials of density in the ratio 3: 1. Then the ratio of acceleration due to gravity g 1 /g 2 at the surface of two planets will be

Choices

Choice (4) Response

a.

b.

c.

1

d.