A) An emf can be induced between the ends of a straight conductor by moving it through a uniform magnetic field
B) The self-induced emf produced by changing current in a coil always tends to decrease the current
C) Inserting an iron core in a coil increases its coefficient of self induction
D) According to Lenz's law, the direction of the induced current is such that it opposes the flux change that causes it
Correct Answer: B
Solution :
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