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प्रश्न
Name the energy transfers which occur when there is a picture on a television screen.
Name the energy conversion that takes place when there is a picture on a television screen.
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उत्तर
A television screen converts electrical energy into light energy and heat energy.
संबंधित प्रश्न
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
State whether the object possess kinetic energy, potential energy, or both :
A man climbing a hill _____________.
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Define the term 'energy' of a body. What is the SI unit of energy.
What are the various forms of energy?
Two bodies having equal masses are moving with uniform speeds of v and 2v respectively. Find the ratio of their kinetic energies.
A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value of the stone?
Name the device which converts electrical energy into mechanical energy.
Name the device or machine which convert :
Mechanical energy into electrical 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.
What kind of energy transformation take place at a hydroelectric power station?
The hanging bob of a simple pendulum is displaced to one extreme position B and then released. It swings towards centre position A and then to the other extreme position C. In which position does the bob have :
(i) maximum potential energy?
(ii) maximum kinetic energy?
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
Name the energy transfers which occur when someone speaks into a microphone.
When an object falls freely towards the earth, then its total energy :
How much energy does a 100 W electric bulb transfer in 1 minute?
