Gravitation [NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics]: Questions 70 - 74 of 249

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Question 70

Question MCQ▾

What would be the angular speed of earth, so that bodies lying on equator may experience weightlessness? (g = 10 m/s2 and radius of earth = 6400 km)

Choices

Choice (4)Response

a.

1.25 ⨯ 10-3 rad/sec

b.

1.25 ⨯ 10-2 rad/sec

c.

1.25 ⨯ 10-4 rad/sec

d.

1.25 ⨯ 10-1 rad/sec

Edit

Question 71

Question 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.

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

d.

Ꭺ is true but Ꭱ is false

Edit

Question 72

Question MCQ▾

Two bodies of mass 104 kg and 105 kg are lying l m apart the gravitational potential at the mid-point of the line joining them is -

Choices

Choice (4)Response

a.

b.

0

c.

d.

Edit

Question 73

Question MCQ▾

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.

b.

c.

d.

Edit

Question 74

Question MCQ▾

Two concentric shells of uniform density having masses M1 and M2 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

Choices

Choice (4)Response

a.

b.

c.

d.

Edit