Question

In a circuit, the value of the alternating current is measured by hot wire ammeter as 10 ampere. Its peak value will be(a) 10 A
(b) 20 A(c) 14.14 A(d) 7.07 A

Answer 1

Find the instantaneous value at 90⁰ point of the sine wave if the wave is ... b) peak to peak value ... of 20A and a sinusoidal alternating current of peak value 20A.

Answer 2

Answer:

c) 14.14 A

Explanation:

Alternating current is an electric current which periodically reverses direction, in contrast to direct current which flows only in one direction.

Hot wire  Ammeter -An ammeter which measures alternating or direct current by sending it through a fine wire, causing the wire to heat and to expand or sag, deflecting a pointer. Also known as thermal ammeter.

So, now according to the problem the Hot Wire Ammeter always consider the RMS(Root Mean Square) value of the current,

hence the peak value is - irms×2√=14.14 amp