Question

The current in the given circuit is

• A. 4.9 A
• B. 6.8 A
• C. 8.3 A
• D. 2.0 A

Answer 1

Answer: (D)

2.0 A

Answer 2

In given circuit $R_B$ and $R_C$ are in series.
$\therefore \, \, R_{BC} = 6 + 6 = 12\, \Omega.$
Now, $R_A$ and $R_{BC}$ are in parallel.
Therefore, equivalent resistance of circuit,
$\, \, \, \, R_{eq} = \frac{12 \times 3}{12 + 3}= \frac{36}{15}.$
Using Ohm's law, $I = \frac{V}{R_{eq}}= \frac{4.8}{36/15}= 2\, A.$