Question

The figure shows a capacitor made of two circular plates each of radius $12\text{cm}$, and separated by $5.0\text{cm}$. The capacitor is being charged by an external source (not shown in the figure). The charging current at an instant is equal to $0.15\text{A}$. The displacement current at that instant is -

• A. $0.05\text{A}$
• B. $0.15\text{A}$
• C. $0.25\text{A}$
• D. $0.35\text{A}$

Answer 1

The correct option is B $0.15\text{A}$

Here, the conduction current is,

$i_c=0.15\text{A}$

Also, we know that, at any instant,

$i_d=i_c$

So, displacement current,

$i_d=0.15\text{A}$

Hence, option $\left(B\right)$ is the correct answer.