EASY
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Light energy can be converted into chemical energy when the plants absorb the light energy.

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Important Questions on Energy

EASY
In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be
MEDIUM

Name a machine that converts electrical energy into mechanical energy.

EASY
The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :
EASY
In any physical or chemical process, the total energy:
EASY
An electric motor converts:
EASY
State the energy changes in the case of a ceiling fan while in use.
EASY
Describe in your words the law of conservation of energy.
EASY
Which device is used to convert mechanical energy into electrical energy? Draw a neat diagram and label the parts of this device.
HARD
Name the device that converts electrical energy into mechanical energy. Draw its diagram and label the parts.
EASY
An electric device which converts electric energy into mechanical energy is called
EASY
State the energy changes in the case of an electric iron while in use.
EASY
Describe the energy transformations that take place when a ball is thrown up in the air, reaches the maximum height, descends and finally hits the ground.
EASY
What do you understand by the term 'transformation of energy'? Explain with an example.
EASY

Name a device or gadget which converts: Heat energy to mechanical energy.

EASY

Name the appliances which work under the following energy transformation.

a. Sound energy into electrical energy.

b. Heat energy into mechanical energy.

 

EASY
What is the form of energy transformation in a microphone? 
EASY
Name the sequence of energy changes taking place in setting a truck in motion.
EASY
Mention how energy changes from one form to the other in a thermal power station.
HARD
State the law of conservation of energy. Prove that energy remains conserved for a freely falling mass m.
EASY
Cross the odd one out. Give reasons to your choices.