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Self Induction

In the circui...

Question

In the circuit shown in the figure, what is the value of $I_{1}$ just after pressing the key $K$ ?

A

5 / 7 A

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B

5 / 11 A

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C

1 A

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D

N o n e o f t h e s e

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Solution

The correct option is A $5 / 7 A$
Just after key k is press current through inductor is zero it behave like a open circuit.
So $I_{1} = I_{2}$

$V = I R$

$\Rightarrow I = \frac{V}{R} = \frac{10}{14} = \frac{5}{7} A$

Hence A option is correct.

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