Question

find the value of current I inthe circuit given as below​

Answer 1

In order to find the answer

Use the equation I=v/r

Current=Volt/Resistance

Answer 2

Resistance A to C = $\frac{30}{2}$ = 15 $\; \Omega$

Resistance A to B = as there are two resistors in series and one in Parallel, Total resistance = (15+15) = 30 $\; \Omega$ Now 15 $\; \Omega$ resistor is in Parallel so,

Total Resistance from A to B,

$\frac{1}{R} = \frac{1}{15} + \frac{1}{30} \\ \\ \frac{1}{R} = \frac{2+1}{30} \\ \\ R = \frac{30}{3} = 10 \; \Omega$

Now, We have

$R = 10 \; \Omega \\ V = 3V \\ \\ We \: Know \: That \\ \qquad \qquad \boxed{V = RI} \\ \\ \Rightarrow \qquad 3 = 10 \times I \\ \\ \Rightarrow \qquad I = 0.3 \; A \\ \\ \bold{Answer \; :} \quad \bold{0.3\; A}$