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NDA Physics quiz work power and energy
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NDA Physics quiz work power and energy
Quiz
Question 1. Work is said to be done when:
A force is applied but no displacement occurs
A displacement occurs without force
A force is applied and displacement takes place in the direction of force
No force is applied
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Question 2. The SI unit of work is:
Newton
Watt
Joule
Erg
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Question 3. Power is defined as:
Work done × Time
Work done per unit time
Force × Displacement
Energy stored in a body
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Question 4. The SI unit of power is:
Joule
Watt
Erg
Newton
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Question 5. Kinetic energy of a body depends upon:
Only its mass
Only its velocity
Both mass and square of velocity
Its acceleration
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Question 6. A body of mass m moving with velocity v has kinetic energy:
m × v
m × v²
½ mv²
2mv²
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Question 7. Potential energy of a body depends on:
Its temperature
Its velocity
Its position or configuration
Its density
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Question 8. The commercial unit of electrical energy is:
Joule
Kilowatt-hour (kWh)
Watt
Ampere
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Question 9. If power of a motor is 1 horsepower, then in watts it is equal to:
546 W
1000 W
746 W
500 W
Submit
Question 10. Work done is zero when:
Force is applied in the direction of displacement
Displacement is perpendicular to the direction of force
Displacement is zero
Force is large
Submit
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