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Maxwell noticed that Ampere's circuital ...

Maxwell noticed that Ampere's circuital law is inconsistant where the electric current changes with time. He showed that consistency required an additional source of magnetic field.
a. What is the current called and which is responsible for the magnetic field ?
b. Given the expression for this type of current.
c. How it differs from conduction current ?

Text Solution

Verified by Experts

a. Displacement current is time varying electric field.
b. Displacement current `I=epsilon A (dE)/(dt)`
c. Displacement current is time varying electric field while conduction current is due to the flow of electrons in the circuit.
Displacement current does not exist under steady conditions, while conduction current exists even if the flow of electrons is at uniform rate.
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