NEET Physics: Questions 1979 - 1982 of 2099

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Question number: 1979

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

The gravitational force between two point masses m 1 and m 2 at separation r is given by

F=km1m2r2

The constant k doesn’t

(1) Depend on medium between masses

(2) Depend on the place

(3) Depend on time

(4) Depend on system of units

Select the correct answers and 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.

2 and 4 are correct

d.

1 and 3 are correct

Question number: 1980

» Rotational Motion » Moment of Inertia

MCQ▾

Question

Moment of inertia depends on,

(1) Distribution of particles

(2) Mass

(3) Radius of gyration

(4) Medium

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

Choices

Choice (4) Response
a.

1 and 3 are correct

b.

1, 2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 1981

» Rotational Motion » Moment of Inertia

Assertion-Reason▾

Assertion (Ꭺ)

Radius of gyration of a body is a constant quantity.

Reason (Ꭱ)

The radius of gyration of a body about an axis of rotation may be defined as the root mean square distance of the particles of the body from the axis of rotation.

Choices

Choice (4) Response
a. Ꭺ is false but Ꭱ is true
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Both Ꭺ and Ꭱ are false

Question number: 1982

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

A particle is suspended from a spring and it stretches the spring by 3 cm on the surface of earth. The same particle will stretches the same spring at a place 500 km above earth surface by -

Choices

Choice (4) Response
a.

1.25 cm

b.

2π5radhr

c.

2.59 cm

d.

2.58 cm

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