Q741
Open question1 Joule is Equal to
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Q742
Open questionA dynamo is a device which
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Q743
Open questionA dynamo is used to convert
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Q744
Open questionA photo-electric cell converts
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Q745
Open questionDynamo is a device for converting
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Q746
Open questionFor a freely falling body, the sum of kinetic energy and potential energy is always
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Q747
Open questionA body of 4.0 kg is lying at rest. Under the action of a constant force, it gains a speed of 5 m/s. The work done by the force will be ________
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Q748
Open questionIf the velocity of a body is halved its kinetic energy ________
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Q749
Open questionSolar energy is converted into chemical energy during
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Q750
Open questionIn which of the following cases, kinetic energy is being used in performing work ?
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Q751
Open questionA body of mass 2 kg is thrown upward with initial velocity of 20 m/s. After 2 seconds, its kinetic energy will be : (g = 10 m/s2)
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Q752
Open questionThe energy stored in a watch spring is
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Q753
Open questionAn object that has kinetic energy must be
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Q754
Open questionA mass of 20 kg is at a height of 8 m above the ground. Then the potential energy possessed by the body is: [Given g = 9.8 m/s2]
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Q755
Open questionA person lifts luggage of 20 kg from the ground and puts it on his head 2m above the ground. Calculate the work done by him. (g = 10 )
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Q756
Open questionWork done in a free expansion process is
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Q757
Open questionAn object of 10 kg is moving with a speed of 2 m/s. The kinetic energy of the object is
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Q758
Open questionIf both the mass and the velocity of a body is increased to twice of their magnitude, the kinetic energy will increase by
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Q759
Open questionKinetic energy depends on
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Q760
Open questionThe device used to convert solar energy into electricity is
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