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Get Answers to all your Questions
(a) What is meant by the statement, “The resistance of a conductor is one ohm” ?
(b) Define electric power. Write an expression relating electric power, potential difference and resistance.
(c) How many resistors in parallel are required to carry 5 A on a 220 V line ?
Answers (1)
(a) If a current of 1 ampere flows through it when the potential difference across it is 1 volt
(b) The electric power is the electric work done per unit time [P=W/T]. the relation between electric powe , potential difference and resistance is P=V2/R
(c) R= V/I
= 220/5 = 44 ohm
R= 44 = 132/n
hence, 132/44 = 3 Resistors
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