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School
Name:____________________________________
Student Name:______________________
Subject: Physics
Class:______9th Section:___________ Roll No:______
Total Marks:_____________ Obtain
Marks:______________
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Q.1. Choose the correct Option Form the following Multiple Choice
Question.
7
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1.
The work will
be zero when the angle between the force and displacement the work will be
zero.
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40ο
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60ο
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90ο
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180ο
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2.
The kinetic
energy of a body of mass 2kg is 25J.its speed will be :
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5ms-1
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12.5ms-1
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25ms-1
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50ms-1
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3.
Energy stored
in a dam’s water is :
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Electrical energy
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Kinetic energy
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Potential energy
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Thermal energy
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4.
A device
which convert light energy into electrical energy is:
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Electric bulb
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Electric generator
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Photocell
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Electric cell
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5.
Rate of doing
work is called:
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Energy
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Torque
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Power
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Momentum
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6.
The energy
stored in a coal is:
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Nuclear energy
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Chemical energy
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Heat energy
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Electrical energy
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7.
If the
velocity of a body becomes three times greater, then its K.E will be:
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3 times
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9 times
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4 times
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6 times
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Q.2. Write the short answer of the
following question? 7*2=14
1.
Define
work and write its equation.
2.
Define
unit of work joule.
3.
Define
potential energy and derive its equation also.
4.
Define
kinetic energy and write its equation.
5.
Define
mechanical energy and give two examples.
6.
What
is meant by energy from biomass.
7.
Define
efficiency and write its equation.
Q.3. Write the detailed Answers of
the following Questions . 5+4=9
1.
Define
kinetic energy and derive its equation.
2.
Write
a note on non-renewable source of energy.
