NEET (2024 Updated)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1939 - 1942 of 5119
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Question 1939
Question MCQ▾
From a uniform wire, two circular loops are made loop-P of radius r and loop-Q of radius nr. Materials of both the loops are same. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 8 times that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)
Choices
Choice (4) | Response | |
---|---|---|
a. | 8 | |
b. | 4 | |
c. | 2 | |
d. | 6 |
Question 1940
Question MCQ▾
At what height above the earth՚s surface does the force of gravity decrease by 10% ? Assume radius of earth to be 6370 km.
Choices
Choice (4) | Response | |
---|---|---|
a. | 150 km | |
b. | 300 km | |
c. | 345 km | |
d. | 245 km |
Question 1941
Question Assertion-Reason▾
Assertion(Ꭺ)
Moment of inertia of a particle is same, whatever be the axis of rotation.
Reason(Ꭱ)
Moment of inertia depends on mass and perpendicular distance of the particle from its axis of rotation.
Choices
Choice (4) | Response | |
---|---|---|
a. | Both Ꭺ and Ꭱ are false | |
b. | Ꭺ is false but Ꭱ is true | |
c. | Ꭺ is true but Ꭱ is false | |
d. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |
Question 1942
Question MCQ▾
ABC is a triangular plate of uniform thickness. The sides are in the ratio shown in the figure. IAB , IBC , ICA are the moments of inertia of the plate about AB, BC, CA respectively. For this arrangement which one of the following relation is correct?
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. | ICA is maximum |