In the given $A.C.$ circuit, the instantaneous current through inductor and capacitor are $0.8 \,A$ and $0.4 \,A$ respectively. The instantaneous current through resistor is ........
$1.2 \,A$
$0.6$
$0.4$
$\sqrt{0.8} \,A$
An alternating current is given by the equation $i=i_{1} \sin \omega t+i_{2} \cos \omega t$. The rms current will be
Hot wire ammeters are used for measuring
The effective value of current $i = 2\, sin\, 100\, \pi\, t + 2 \,sin(100\, \pi \,t + 30^o)$ is :
What is the maximum voltage of $220\, V$ ?
Three alternating voltage sources $V_1$ = $3 sin \omega t $ volt , $V_2= 5 sin(\omega t + \phi _1)$ volt and $V_3 = 5 sin(\omega t -\phi_2 )$ volt connected across a resistance $R= \sqrt {\frac{7}{3}} \Omega $ as shown in the figure (where $ \phi_1$ and $ \phi_2$ corresponds to $30^o $ and $127^o $ respectively). Find the peak current (in Amp) through the resistor