EASY
Earn 100

Explain the energy conversion happening during charging and discharging of a battery.

Important Questions on Energy: Forms and Sources

EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be
MEDIUM
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy

Name a machine that converts electrical energy into mechanical energy.

EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
In any physical or chemical process, the total energy:
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
An electric motor converts:
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
State the energy changes in the case of a ceiling fan while in use.
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
Describe in your words the law of conservation of energy.
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
Which device is used to convert mechanical energy into electrical energy? Draw a neat diagram and label the parts of this device.
HARD
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
Name the device that converts electrical energy into mechanical energy. Draw its diagram and label the parts.
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
An electric device which converts electric energy into mechanical energy is called
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
State the energy changes in the case of an electric iron while in use.
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
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
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy
What do you understand by the term 'transformation of energy'? Explain with an example.
EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy

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

EASY
Science>Physics>Energy: Forms and Sources>Transformations and Transfer of Energy

Name the appliances which work under the following energy transformation.

a. Sound energy into electrical energy.

b. Heat energy into mechanical energy.

 

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