NEET Physics: Questions 1823 - 1825 of 2098

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Question number: 1823

» Gravitation » Gravitational Acceleration

MCQ▾

Question

Select the wrong statements from the following

(1) The orbital velocity of a satellite increases with the radius of the orbit

(2) Escape velocity of a particle from the surface of the earth depends on the speed with which it is fired

(3) The time period of a satellite does not depend on the radius of the orbit

(4) The orbital velocity is inversely proportional to the square root of the radius of the orbit

Select the correct answers with mark it according to the following codes:

Choices

Choice (4) Response

a.

1 and 2 are correct

b.

1.2 and 3 are correct

c.

1 and 3 are correct

d.

1 and 4 are correct

Question number: 1824

» Communication System » Need for Modulation

MCQ▾

Question

An oscillator is producing FM waves of frequency 4 kHz and modulating index is 8. Thus calculate the variation.

Choices

Choice (4) Response

a.

5.0

b.

0.20

c.

0.67

d.

1.5

Question number: 1825

» Experimental Skills » P-N Junction Diode

MCQ▾

Question

Which of the following statement is wrong regarding a p-n junction diode?

Choices

Choice (4) Response

a.

When the p-type section is connected to the negative terminal and the n-type section to the positive terminal of the battery the diode is said to be reverse biased

b.

When the p-type section is connected to the positive terminal and the n-type section to the negative terminal of the battery the diode is called forward biased

c.

When the diode is in reverse biased mode a forward current flows

d.

When the diode is in forward biased mode a forward current flows.

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