KVPY Stream-SA (Class 11) Physics: Questions 150 - 153 of 252
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Question number: 150
» Work, Energy and Power » Power
Question
A boy of weight 50 kg climbs up a staircase carrying 15 kg load on his head. The staircase has 35 steps and each step has a height of 15 cm. If he takes 20 seconds to climb, calculate the power developed by him. (g = 9.8 ms-2)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 167.21 |
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| b. | 323.3 |
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| c. | 527.5 |
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| d. | 95.32 |
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Question number: 151
» Laws of Motion » Law of Conservation of Linear Momentum
Question
A massless platform of hard paper is kept on a light elastic spring as figure shows. When a particle of mass 500 g is dropped on the platform from a height of 0.32 m, the particle strikes the platform and compresses the spring by 0.05 m. From what height the particle is dropped to get a compression of 0.08 m?
A Platform Attached on the Spring
In figure a platform of hard paper is attached on the spring. And a particle of mass 500 gm is dropped from height 0.32 m.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 0.78 |
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| b. | 0.68 |
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| c. | 0.86 |
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| d. | 0.70 |
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Question number: 152
» Current Electricity » Electrical Energy and Power
Question
In the following circuit, the 3 Ω resistor dissipates power Pi. If the resistor is replaced by 7 Ω, the power dissipated in it is Pf, then
Circuit of Combination of Three Different Resistors
In figure circuit diagram of combination of three different resistors is shown.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
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| b. |
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| c. |
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| d. | Question does not provide sufficient data or is vague |
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Question number: 153
» Current Electricity » Kirchhoff's Laws
Question
Figure below shows a portion of an electric circuit with the currents in amperes and their directions. The magnitude and direction of the current in the portion AB is
A Portion of an Electric Circuit Indicated Current
In figure a portion of an electric circuit indicated direction and magnitude of current.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 1 A from A to B |
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| b. | 2A from B to A |
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| c. | 3 A from B to A |
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| d. | 0A |
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