Physics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 31 - 36 of 133
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Question number: 31
» Physics » Magnetism & Electricity at Work
Question
A current of 0.5 A is drawn by a filament of an electric bulb for half an hour. What is the amount of electric charge that flows through the circuit?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 900°C |
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| b. | 9°C |
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| c. | 5°C |
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| d. | 600°C |
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Question number: 32
» Physics » Motion and Force
Question
A rider on horseback falls when horse starts running all of a sudden because
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | inertia of rest keeps the upper part of body at rest whereas lower part of the body moves forward with the horse |
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| b. | rider is taken back |
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| c. | rider is suddenly afraid of falling |
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| d. | All of the above |
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Question number: 33
» Physics » Motion and Force
Question
A particle is moving on a circular path with constant speed, and then its acceleration will be
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | external radial acceleration |
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| b. | internal radial acceleration |
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| c. | zero |
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| d. | constant acceleration |
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Question number: 34
» Physics » Motion and Force
Question
In case of uniform circular motion, which of the following physical quantity does not remain constant?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Mass |
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| b. | Speed |
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| c. | Momentum |
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| d. | Kinetic energy |
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Question number: 35
» Physics » Motion and Force
Question
When a body moves with a constant speed along a circle
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | no force acts on the body |
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| b. | no acceleration is produced in the body |
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| c. | no work is done on it |
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| d. | its velocity remains constant |
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Question number: 36
» Physics » Magnetism & Electricity at Work
Question
A water heater marked 2 kW, 220 V is connected to a 220 V supply. How long will it take to heat 20 kg of water from 10°C to 30°C? Assume that all the heat is taken up by the water, (specific heat of water = 4200 J kg- 2 C- 2)
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | 14min |
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| b. | 28 min |
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| c. | 41 min |
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| d. | 20min |
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