First slide

Alternating Current and voltage

Question

In a circuit, the value of the alternating current is measured by hot wire ammeter as 10 ampere. Its peak value will be

Easy

A

10 A
B

20 A
C

14.14 A
D

7.07 A

Solution

Hot wire ammeter reads rms value of current. Hence its peak value $= i_{rms} \times \sqrt{2} = 14 .14 amp$

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