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S.I. unit of current is :-

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A galvanometer measures current which passes through it. A galanometer can measure typically carrent of order of mA. To be able to measure currents of the order of amperes of main current, a shunt resistance 'S' is connected in parallel with galvanometer. If resistance of galavonometer is 10Omega and maximum current i_(g) is 10mA then the shunt resistance required so that the main current 'I' can be upto 1A is (in Omega )

(a) The peak voltag3e of an a.c. supply is 300 V. What is its r.m.s voltages? (b) The r.m.s value of current in an ac circuit is 10 A. What is the peak current ?

AB is a part of circuit. Find the potential difference V_(A) - V_(B) if a. current i = 2 A and is constant, b. current i = 2 A and is increasing at the rate of 1 A s^(-1) , c. current i = 2 A and is decreasing at the rate of 1 A s^(-1) ,

AB is a part of circuit. Find the potential difference V_(A) - V_(B) if a. current I = 2 A and is constant, b. current i = 2 A and is increasing at the rate of 1 A s^(-1) , c. current i = 2 A and is decreasing at the rate 1 A s^(-1) ,