In a circuit, the value of the alternating current is measured by hot wire ammeter as $10$ ampere. Its peak value will be......$A$
$10$
$20$
$14.14$
$7.07$
The frequency of an alternating voltage is $50$ cycles/sec and its amplitude is $120\,V$. Then the $ r.m.s$. value of voltage is........$V$
In an ac circuit, peak value of voltage is $423\, volts$. Its effective voltage is .......... $volts$
A $40$ $\Omega$ electric heater is connected to a$ 200 V, 50 Hz$ mains supply. The peak value of electric current flowing in the circuit is approximately......$A$
The peak value of an alternating e.m.f. E is given by $E = {E_0}\cos \omega \,t$ is $10\, volts$ and its frequency is $50\; Hz$. At time$t = \frac{1}{{600}}\;sec$, the instantaneous e.m.f. is
Which of the following components of a $LCR$ circuit, with $ac$ supply, dissipates energy