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 |
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 |
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. |
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. |
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
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |