WORK , ENERGY AND POWER
Work, Energy, and Power Quiz
Test your knowledge on the fundamental concepts of work, energy, and power with this engaging quiz! Perfect for students, teachers, and anyone interested in physics.
Topics covered include:
- Work and its various forms
- Energy types and transformation
- Power calculations
- Real-world applications of physics concepts
When the displacement along the same direction of the force. Then the work is said to be _______
Zero
Negative
Positive
Infinity
What amount of work is done by a centripetal force in a circular motion?
+1
-1
0
None of these
When the displacement along the opposite direction of the force. Then the work is said to be _____
Zero
Negative
Positive
Infinitive
Work done by the force of gravity is same whether the body comes down from a certain height using stairs or slope or a lift. Is the statement true or false?
True
False
What is the S.I unit of work?
Joule
Erg
Newton
Dyne
What is C.G.S unit of work
Joule
Erg
Newton
Dyne
KWh is the unit of
Power
Force
Energy
None of these
One horse power is equal to
1000W
500W
764W
746W
A body at a height possesses
Kinetic energy
Potential energy
Solar energy
Heat energy
In an electric cell while in use, the change in energy is from
Electrical to mechanical
Electrical to chemical
Chemical to mechanical
Chemical to electrical
Work done by a centripetal force
Decreasing by increasing the radius of the circle
Increases by increasing the mass of the body
Is always zero
Increases by decreasing the radius of the circle
When a body is released from a height the K.E of the body is gradually changed into potential energy
True
False
When the pendulum bob is in the mean position, total energy will be minimum
True
False
When the force applied and the displacement of the body is inclined at 90 degree , with each other, the work done is _____
Infinite
Maximum
Zero
Unity
Most of the energy we use originally comes from
Ocean
Air
Soil
Sun
A watch spring in the wounded position has both kinetic as well as potential energies
True
False
A body is moved from A to B in three different paths in conservative force field. The work done will be maximum when the body is moved along the longest path
True
False
When a ball is thrown vertically upwards its velocity keeps on decreasing. What happens to its Kinetic energy when it reaches the maximum height?
K.E is half the initial value
K.E is maximum at maximum height
K.E is zero
K.E is double
Which of the following is not a constituent of coal gas?
Hydrogen
Methane
Carbon mono oxide
Carbon di oxide
A solar cell converts?
Heat energy into electrical energy
Sound energy into electrical energy
Solar energy into heat energy
Solar energy into electrical energy
In the SI system, the unit of potential energy .PE is ____
Erg
Dyne-cm
Joule
M/s
Work done by the gravitational force on a body is _____
Always positive
Always negative
Zero
Positive, negative or zero
Fuel used in thermal power plants is
Water
Uranium
Bio- mass
Fossil fuel
A 1kW hair dryer is used for half an hour. How much energy is used?
1 unit
0.5 unit
1.5 unit
0.05 unit
A bird flying in the sky has only Kinectic energy.
True
False
A girl lifts a doll from the floor and places it on a table. If the weight of the doll is known then, _____ is required to calculate the work done by the girl on the doll.
Time taken to lift the doll
Height of the table
mass of the doll
Shape of the doll
A diesel engine supplies 25,000 J of energy in 50 sec. What will be the power of engine?
25000W
500W
750W
250W
When a body is whirled in a circle, then work done on it by the tension in the string is ______
Positive
Negative
Zero
Infinite
A constant force applied on the body displaced it through a distance , so that the angle between force and displacement is theta . Work done will be maximum when ______
Theta = 90 degree
Theta =45 degree
Theta =0 degree
Theta = 60 degree
No work is said to be done, when an object moves at an angle of ____ with the direction of the force
0 degree
90 degree
75 degree
180 degree
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