ElectroMagnetic InductionHard
Question
A closed circuit consists of a resistor R, inductor of inductance L and a source of emf E are connected in series. If the inductance of the coil is abruptly decreased to L/4 (by removing its magnetic core), the new current immediately after this moment is : (before decreasing the inductance the circuit is in steady state)
Options
A.zero
B.E/R
C.
D.
Solution
Flux through a closed circuit containing an inductor does not change instantaneously.
∴
= 
(i) ⇒ i = 
Ans.
∴
= (i) ⇒ i = Ans. Create a free account to view solution
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