Find out the following in the electric circuit given in Figure.
$(a)$ Effective resistance of two $8\,\Omega $ resistors in the combination
$(b) $ Current flowing through $4\,\Omega $ resistor
$(c)$ Potential difference across $4\,\Omega $ resistance
$(d)$ Power dissipated in $4\,\Omega $ resistor
$(e)$ Difference in ammeter readings, if any.
$1\, m\,A =\ldots \ldots \ldots\, A$
How much work is done in moving a charge of $2\, C$ across two points having a potential difference $12 \,V ?$
If the resistance of a conductor is doubled, the current is halved.
$100 \,J$ of heat is produced each second in a $4\, \Omega$ resistance. Find the potential difference across the resistor.