Question

guys please solv this it is urgent​

Answer 1

Answer:

0.9Amps

Explanation:

Steps in the pic

hope it helps

Answer 2

Answer:

0.9 A

Explanation:

The equivalent resistance in case when key is open is R/2.

Thus by ohm's law: $\epsilon=iR_{eq}$

$\epsilon=(0.6)\frac{R}{2}$

$\epsilon=(0.3)R$

Now when key is closed, equivalent resistance becomes R/3.

$\epsilon=iR_{eq}\\(0.3)R=i\frac{R}{3}\\i=0.9 \ A$

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