Q.
In order to establish an instantaneous displacement current of 1mA in the space between the plates of 2μF parallel plate capacitor, the rate of change of potential difference is
ID=1mA=10−3A; C=2μF=2×10−6F ID=IC=dtd(CV)=CdtdV
Therefore, dtdV=CID=2×10−610−3=500Vs−1
Therefore, applying a varying potential difference of 500Vs−1 would produce a displacement current of desired value.