- What is a ‘solar cell?
- Why is biogas considered an ideal fuel for domestic use?
- Name a device in which controlled chain reaction is used.
A solar cell is a device which converts solar energy into electricity. It is a sandwich of
a silicon-boron layer and a silicon-arsenic layer.
Biogas is an ideal fuel for domestic use because it is a cheap and clean fuel, which does not leave behind any residue.
A nuclear power plant is a device in which controlled chain reaction is used.