1)a radio frequency choke is air cored whereas an audio frequency choke is iron cored. give reasons for this difference.
2)a resting electron near a stationary bar magnet does not set into motion. But a moving magnet near a electron set it into motion. Why?
3) Three identical inductors L1,L2,L3 are connected in a circuit. The magnetic field at the centre of inductor L1 is 0.2 tesla. What is the magnetic field inside the inductor L2?
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