An Emf of 10 V Is Applied to a Coil $\varOmega$

An emf of 10 V is applied to a coil having an inductance of 40 mH resistance of .If it takes 0.55 s for the current to reach one half of its maximum value,what is the resistance of the coil?

A) 0.050 $\varOmega$
B) 0.50 $\varOmega$
C) 0.11 $\varOmega$
D) 0.037 $\varOmega$

Correct Answer:

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