Question

find out the electric current

Answer 1

1.2a is the current of this circuit

Answer 2

The circuit is an example of a balanced wheatstone bridge because:

$\frac{10}{25}$ = $\frac{2}{5}$

⇒ $\frac{2}{5}$ = $\frac{2}{5}$

∴ No current flows throught the central branch.

Now, 10 ohm and 2 ohm resistors are connected in series

∴ Net resistance = 12 ohm

Similarly, 25 ohm and 5 ohm are in series

∴ Net resistance = 30 ohm

Now,

12 ohm and 30 ohm are connected in parallel

∴ Ratio of current in each branch = 30:12 = 5:2

⇒ Current through 2 ohm = $\frac{5}{7}$ × 1.4 = 1A

This is the correct answer.

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