NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 453 - 456 of 2184
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Question number: 453
» Rotational Motion » Angular Momentum
Question
Assertion (Ꭺ)
Torque is equal to rate of change of angular momentum.
Reason (Ꭱ)
Angular momentum depends on moment of inertia and angular velocity.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Both Ꭺ and Ꭱ are false |
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| b. | Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ |
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| c. | Ꭺ is true but Ꭱ is false |
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| d. | Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ |
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Question number: 454
» Electrostatics » Electrostatic Potential Energy
Question
If V and u are electric potential and energy density, respectively, at a distance r from a positive point charge, then which of the following graph is correct?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |  Option a Graph of V2→U figure shows that the graph of V2→u is not linear |
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| b. |  Option B Graph of V2→U figure shows that the graph of V2→u is not linear |
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| c. |  Option C Graph of V2→U Figure shows that the graph of V2→u is lenear and it pass though origin. |
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| d. |  Option D Graph of V2→U Figure shows that the graph of V2→u is linear sloping downwards |
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Question number: 455
» Rotational Motion » Angular Momentum
Question
In a bicycle, the radius of rear wheel is twice the radius of front wheel. If r F and r r are the radius, v p and v r are speeds of top most points of wheel, then
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | v F > v r |
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| b. | v F = v r |
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| c. | v F = 2v r |
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| d. | v r = 2v F |
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Question number: 456
» Current Electricity » Potential Difference and EMF of Cell
Question
When a cell of emf E and internal resistance r, is connected to the ends of a resistance R, then current through resistance is I. If the same cell is connected to the ends of a resistance then the current would be
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Greater than 2I |
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| b. | less than I |
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| c. | Greater than I but less than 2I |
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| d. | I |
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