Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Electromagnetic Waves

Question:

The conduction current is same as displacement current when source is:

Options:

ac only

dc only

either ac or dc

neither dc nor ac

Correct Answer:

either ac or dc

Explanation:
for a DC (constant ) voltage, the capacitor current is zero.  Hence, for a DC source the conduction current and displacement current (capacitor current) are not same.
Whereas, by Maxwell's equation for a time varying voltage (AC voltage), both conduction and displacement currents are same.