# We can establish an instantaneous displacement current of $1\: A$ in the space between the two plates of a $1\: \mu\: F$ parallel plate capacitor by varying voltage at the rate of
$\begin {array} {1 1} (a)\;10^9 V/s & \quad (b)\;10^{12}V/s \\ (c)\;10^8 V/s & \quad (d)\;10^6V/s \end {array}$