Gravitation (NEET Physics): Questions 70 - 74 of 84

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Question number: 70

» Gravitation » Gravitational Acceleration

MCQ▾

Question

What would be the angular speed of earth, so that bodies lying on equator may experience weightlessness? (g = 10 m/s 2 and radius of earth = 6400 km)

Choices

Choice (4) Response

a.

1.25 ⨯ 10 -2 rad/sec

b.

1.25 ⨯ 10 -1 rad/sec

c.

1.25 ⨯ 10 -4 rad/sec

d.

1.25 ⨯ 10 -3 rad/sec

Question number: 71

» Gravitation » Universal Law of Gravitation

Assertion-Reason▾

Assertion (Ꭺ)

Gravitational force between two particles is negligibly small compared to the electrical force.

Reason (Ꭱ)

The electrical force is experienced by charged particles only.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

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

Question number: 72

» Gravitation » Gravitational Potential

MCQ▾

Question

Two bodies of mass 10 4 kg and 10 5 kg are lying l m apart the gravitational potential at the mid-point of the line joining them is -

Choices

Choice (4) Response

a.

Equation

b.

0

c.

Equation

d.

Equation

Question number: 73

» Gravitation » Gravitational Acceleration

MCQ▾

Question

If the radius of the earth were to shrink by 25 % its mass remaining the same, the acceleration due to gravity on the earth’s surface would be given as-

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 74

» Gravitation » Universal Law of Gravitation

MCQ▾

Question

Two concentric shells of uniform density having masses M 1 and M 2 are situated as shown in the figure. The force on the particle of mass m when it is located at r = b is

Two concentric shells - having masses M1 and M2

Two Concentric Shells - Having Masses M1 and M2

In above fig we shows that two concentric shells of uniform density having masses M1 and M2

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

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