Advertisements
Advertisements
प्रश्न
What is a solar cell?
Advertisements
उत्तर
A solar cell is an electrical device that converts light energy directly into electricity with the help of photovoltaic effect. Solar cells are usually made from semiconductors like silicon and gallium with some impurity added to it. When sunlight is made incident on a solar cell, a potential difference is produced between its surface, due to which a current flows in the circuit connected between the opposite faces of the semiconductor.
APPEARS IN
संबंधित प्रश्न
State the energy change in the following device while in use:
A loudspeaker
Name the form of mechanical energy, which is put to use.
State two disadvantages of producing electricity from solar energy.
How much electric power is generated in India using the wing energy?
MULTIPLE CHOICE TYPE:
The ultimate source of energy is:
(a) wood
(b) wind
(c) water
(d) sun
A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:
The total energy possessed by the body at any instant? (Take g = 10 ms-2).
What do you understand by the kinetic energy of the body?
What kind of energy is possessed in a situation when?
A cocked up spring of air gun.
In which states is water found in nature?
The major problem in harnessing nuclear energy is how to
