NEET Physics: Questions 1817 - 1822 of 2098

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Question number: 1817

» Communication System » Basic Elements of Communication System

MCQ▾

Question

Laser beams are used to measure long distances because

Choices

Choice (4) Response

a.

They have high degree of parallelism

b.

They are highly polarised

c.

They are coherent

d.

They are monochromatic

Question number: 1818

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

If a graph is plotted between T 2 and r 3 for a planet then its slope will be –

Choices

Choice (4) Response

a.

GM4π2

b.

4πGM

c.

4π2GM

d.

0

Question number: 1819

» Oscillations and Waves » Beats

MCQ▾

Question

Two sirens situated one kilometer apart are producing sound of frequency 330 Hz. An observer starts moving from one siren to the other with a speed of 5 m/s. If the speed of sound be 330 m/s, what will be the beat frequency heard by the observed

Choices

Choice (4) Response

a.

8

b.

4

c.

16

d.

10

Question number: 1820

» Gravitation » Gravitational Acceleration

MCQ▾

Question

At what height above the surface of the earth is the acceleration due to gravity 6 % of its value at the surface? (Take R to be earth radius)

Choices

Choice (4) Response

a.

4R

b.

R

c.

8R

d.

R4

Question number: 1821

» Experimental Skills » Ohm's Law

MCQ▾

Question

In making an Ohm’s law circuit, which of the following connection is correct?

Choices

Choice (4) Response

a.

Voltmeter in series and ammeter in parallel

b.

Voltmeter in parallel and ammeter in series

c.

Voltmeter and ammeter both are in series

d.

Voltmeter and ammeter both are in parallel

Question number: 1822

» Oscillations and Waves » Doppler Effect in Sound

MCQ▾

Question

A source of sound and a listener are moving towards each other with a speed 112 of the speed of sound. If the frequency of the note emitted by the source is f, the frequency of the note heard by the listener will be nearly:

Choices

Choice (4) Response

a.

1.20 f

b.

2.0 f

c.

2.20 f

d.

1.18 f

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