Match the following
Currents $r.m.s.$ values
(1)${x_0}\sin \omega \,t$ (i)$ x_0$
(2)${x_0}\sin \omega \,t\cos \omega \,t$ (ii)$\frac{{{x_0}}}{{\sqrt 2 }}$
(3)${x_0}\sin \omega \,t + {x_0}\cos \omega \,t$ (iii) $\frac{{{x_0}}}{{(2\sqrt 2 )}}$
$1. \,(i), \,2. \,(ii),\, 3.\, (iii)$
$1. \,(ii),\, 2.\, (iii),\, 3.\, (i)$
$1. \,(i), \,2.\, (iii), \,3.\, (ii)$
None of these
the reason why do we preferred an $a.c.$ voltage instead of $d.c.$ voltage.
Both alternating current and direct current are measured in amperes. But how is the ampere defined for an alternating current ?
The r.m.s. voltage of domestic electricity supply is $220$ $volt$ . Electrical appliances should be designed to withstand an instantaneous voltage of......$V$
If ${E_0}$ represents the peak value of the voltage in an ac circuit, the r.m.s. value of the voltage will be
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