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CBSE
Class 11 Physics
Work Energy And Power Chapter 6
Quiz 1
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Which of the following is not correct for the condition for work not to be done:
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force and displacement are perpendicular to each other.
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force and displacement are at 180 degrees with each other
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displacement is zero, though force is non-zero
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force is zero
There are two bodies X and Y with equal kinetic energy but different masses m and 4m respectively. The ratio of their linear momentum is-
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1:2
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4:1
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1:√2
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1:4
Which of the following is not an example of zero work?
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The work done by the tension in the string, when a body tied with the string move along a circular path.
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When a horse pulls a cart on a level road.
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The work done by a coolie when he travels on a horizontal platform, with a load on his head.
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When a person holds some amount of load but, does not move from his position.
A truck moves at a steady speed on a horizontal road. What is the work done by the road on the truck?
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Not defined as the truck is non- living object.
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Negative work is done on the truck.
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No work is done on the truck.
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Positive work is done on the truck.
Which of the following is not a unit of energy?
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newton metre
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electron volt
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joule/metre
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kilowatt hour
Which of the following statements is false:
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kinetic energy is positive
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potential energy is positive
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kinetic energy is negative
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potential energy is negative
Raindrops fall on the earth with certain kinetic energy on the earth. From where do they get this energy?
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Chemical Energy
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Gravitational Potential Energy
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Energy between molecules of water
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Heat Energy
Time rate at which work is done by a force is
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Power
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Torque
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Centrifugal Force
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Acceleration
The projection of is given by
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A
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B
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C
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D
For what angle between Force and Displacement will the work done be positive?
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A
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B
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C
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D
0 h : 0 m : 1 s
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