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प्रश्न
State the energy changes which take place when:
A bulb glows, when torchlight is switched on.
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उत्तर
The chemical energy of cell changes to electric energy. The electric energy first changes to heat and finally to light energy.
संबंधित प्रश्न
What is nuclear energy?
State two factors on which the kinetic energy of a moving body depends.
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
An arrow shot out of a bow.
Why using wood as fuel is not advisable although wood is a renewable source of energy?
Identify the type of energy possessed by the body in each of the following:
(a) A coiled spring of the toy car
(b) A hammer which is raised
(c) A stone shot from a catapult
(d) Water stored in the overhead tank
(e) A tadpole moving in water.
What is the main energy transformation that occur in:
Charging of a battery.
Name the two groups in which various sources of energy are classified?
State the energy changes which take place when:
During electrolysis.
A body of mass m falls from a height h1 to a height h2, above the ground (h1 > h2). What is the loss of potential energy?
What are the small particles that can be seen in a beam of light that enters a dark room?
