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(a) Define electric current. What is the...

(a) Define electric current. What is the SI unit of electric current.
(b) One coulomb of charge flows through any cross-section of a conductor in 1 second. What is the current flowing through the conductor?
(c) Which instrument is used to measure electric current? How should it be connected in a circuit?
(d) What is the conventional direction of the flow of electric current? How does it differ from the direction of flow of electrons?
(e) A flash of lightning carries 10C of charge which flows for 0.01s. what is the current? If the voltage is 10MV, what is the energy?

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The correct Answer is:
(b) 1 ampere (e) 1000A; 100 MJ (0r 100,000,000J) Note. M = Mega which means 1 million or 1000,000
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  16. The substance having infinitely high electrical resistance is called:

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