Question

What is the current drawn from the battery of 6V?

• A. 125A
• B. 12.5A
• C. 1.25A
• D. 2.5A

Answer 1

Answer: (C)

1.25A

Answer 2

≡

R_eq = $\frac{2R_{1}R_{2} + R_{1}R_{3} + R_{2}R_{3}}{R_{1} + R_{2} + 2R_{3}}$

= $\frac{2 \times 2 \times 4 + 2 \times 2 + 4 \times 2}{2 + 4 + 2 \times 2}$ = $\frac{16 + 4 + 8}{2 + 4 + 4} = \frac{28}{10}$ = 2.8Ω

i = $\frac{6}{2 + 2.8} = \frac{6}{4.8}$= 1.25 Amp.