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प्रश्न
Name the energy transfers which occur when an electric ball rings.
Name the energy conversion that takes place when an electric bell rings.
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उत्तर
An electric bell converts electrical energy to sound energy.
संबंधित प्रश्न
A ball is placed on a compressed spring. What form of energy does the spring possess? On releasing the spring, the ball flies away. Give a reason.
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
What kind of energy is possessed by the following?
Water stored in the reservoir of a dam __________.
What kind of energy is possessed by the following?
A compressed spring ____________.
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
Give two examples where a body possesses both, kinetic energy as well as potential energy.
Name the device or machine which convert :
Electrical energy into heat energy.
Name the device or machine which convert :
Light energy into electrical energy.
Name the device or machine which convert :
Chemical energy into heat energy.
Name the device or machine which convert :
light energy into heat energy.
Fill in the blank with suitable word:
The electricity meter installed in our homes measure electrical energy in the units of ___________.
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
Fill in the blanks with suitable words :
The principle of ___________ of energy says energy can be transformed from one form to another, but it cannot be ___________ or ___________.
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
Name the energy transfers which occur when a torch is on.
A ball falls to the ground as shown below :
What is the kinetic energy of ball when it hits the ground?
Which one of the following is not the unit of energy?
How much energy does a 100 W electric bulb transfer in 1 minute?
In the case of negative work, the angle between the force and displacement is
A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 s is
