What is the role of a switch in an electric circuit?

What is the role of the brain in reflex action?

What does an electric circuit mean?

What is the role of Bithional in toilet soap?

What is an electric charge ?

What is the role of graphite rod in the electrometallurgy of aluminium?

What is an electric dipole?

Explain the source of solar energy with the help of proton-proton cycle. What is the role of cadmium rods in a nuclear reactor?

What is the role of moderator in nculelar reactor?

What is the role of MI in rotational motion?