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प्रश्न
Name the device or machine which convert :
Electrical energy into sound energy.
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उत्तर
A speaker in radio and television converts electrical energy into sound energy.
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संबंधित प्रश्न
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
State whether the object possess kinetic energy, potential energy, or both :
A bird running on the ground ____________.
State whether the object possess kinetic energy, potential energy, or both :
A stretched spring lying on the ground ____________.
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
Define the term 'energy' of a body. What is the SI unit of energy.
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
Name the energy transfers which occur when :
someone speaks into a microphone
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
When an object falls freely towards the earth, then its total energy :
A microphone converts :
