Find the rms value for the saw-tooth voltage of peak value $V_0$ from $t = 0$ to $t = 2T$ as shown in figure
$V_0$
$\frac{V_0}{2}$
$\frac{V_0}{\sqrt{2} }$
$\frac{V_0}{\sqrt{3} }$
The frequency of $ac$ mains in India is.......$Hz$
Explain electrical energy when an ac current passes through a resistor.
An $ac$ source is rated at $220V, 50 Hz.$ The time taken for voltage to change from its peak value to zero is.....$sec$
A generator produces a voltage that is given by $V = 240\,sin \,120\,t$, where t is in seconds. The frequency and $ r.m.s.$ voltage are
The variation of $EMF$ with time for four types of generators are shown in the figures. Which amongst them can be called $AC$ ?