In general in an alternating current circuit
The average value of current is zero
The average value of square of the current is zero
Average power dissipation is zero
The phase difference between voltage and current is zero
In a circuit, current varies with time as $i = 2\sqrt t $ . Root mean square value of current for interval $t = 2\,s$ to $t = 4\,s$ is
The effective value of current $i = 2\, sin\, 100\, \pi\, t + 2 \,sin(100\, \pi \,t + 30^o)$ is :
The charge in an $LC$ circuit with negligible resistance oscillates as given by equation $\frac{{{d^2}q}}{{d{t^2}}} + 16{\pi ^2}q = 0$. If the charge is maxiumum equal to $24\,\mu C$ at $t = 0$, find the charge at $t = \frac{1}{{12}}\,s$............$\,\mu C$
What is the $r.m.s$. value of an alternating current which when passed through a resistor produces heat which is thrice of that produced by a direct current of $2$ amperes in the same resistor......$amp$
The frequency of $ac$ mains in India is.......$Hz$