Same chapter3 marksDifficulty: Medium
State four properties of electromagnetic waves.
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3 marksDifficulty: Medium
What is displacement current, and why did Maxwell introduce it?
Original Khojo Papers practice question — not from a past board paper.
Answer
Displacement current is the current attributed to a changing electric field, given by ε0 times the rate of change of electric flux. Maxwell introduced it because Ampere's circuital law gave inconsistent results for a surface passing between the plates of a charging capacitor, where no conduction current flows although a magnetic field is present.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The addition made the equations symmetric and predicted electromagnetic waves.
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