The peak value of an Alternating current is $ 6$ amp, then r.m.s. value of current will be
$3 A$
$3\sqrt 3 $A
$3\sqrt 2 $ $A$
$2\sqrt 3 $ $ A$
Hot wire ammeters are used for measuring
An AC source is rated $222 \,V , 60 \,Hz$. The average voltage is calculated in a time interval of $16.67 \,ms$. It
Which of the following units denotes the dimension $\frac{{M{L^2}}}{{{Q^2}}}$ where $Q$ denotes the electric charge?
The phase difference between the voltage and the current in an ac circuit is $\pi /4$. If the frequency is $50\, Hz$ then this phase difference will be equivalent to a time of
What are $A.C.$ signals ?