Advertisements
Advertisements
प्रश्न
The following are some of the energy transformations.
A. Electrical to light
B. Work to heat
C. Chemical to light
D. Electrical to sound
E. Mechanical to electrical
Identify the energy transformation that takes place in the following by inserting the corresponding letter in the shape provided.
(i) A candle flame
(ii) A torch is lighted
(iii) A microphone is used in a meeting
(iv) A cycle dynamo
(v) A piece of metal is being filed
Advertisements
उत्तर
(i) A candle flame - (C). Chemical to light
(ii) A torch is lighted - (A). Electrical to light
(iii) A microphone is used in a meeting - (D). Electrical to sound
(iv) A cycle dynamo - (E). Mechanical to electrical
(v) A piece of metal is being filed - (B). Work to heat
APPEARS IN
संबंधित प्रश्न
Write true or false of the following statement.
There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.
Name the type of energy (kinetic or potential) possessed by the following:
A compressed spring.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given cases:
A moving cricket ball
What kind of energy is possessed in a situation when?
A fish moving in the water.
Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
Explain the principle of working of the windmill for generating electricity.
What is nuclear energy? Explain the principle of producing electricity using nuclear energy is a nuclear reactor.
A body of mass 50 kg has a momentum of 3000 kg−1 ms. Calculate:
(j) the kinetic energy of the body.
(ii) the velocity of the body.
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
What ts the original source of energy for the electricity produced at a thermal power station?
