COMEDK20269 May 2026Morning ShiftPhysicsElectromagnetic WavesActual
Which of the following is incorrect for displacement current
Options
- ADisplacement current exists only when electric field changes with time
- BDisplacement current obeys ohm's law
- CDisplacement current produces magnetic field just like conduction current
- DUnlike conduction current, displacement current does not involve the flow of electrons through a conductor
Correct answer
B. Displacement current obeys ohm's law
Step-by-step solution
Displacement current is given by I_d = ₀ d _E dt , which means it exists only when the electric flux or electric field changes with time. It produces a magnetic field in the same way as conduction current, as described by the Ampere-Maxwell law. Displacement current does not involve the actual flow of charge carriers (like electrons) through a conductor. Ohm's law ( V = IR or J = E ) is applicable only to conduction current, which involves the flow of charge carriers in a conductor. Displacement current does not ob