Question

How many 176 $\Omega$ resistors in parallel are required to carry total 5 A current on a 220 V line?

• A. 8
• B. 4
• C. 6
• D. 10

Answer 1

The correct option is B 4



From the above diagram, we can see that value of the equivalent resistance must be equal to equivalent resistance of the parallel combination of $n$ number ($R_1,R_2,R_3$ and so on) of 176 $\Omega$ resistors.

$\therefore R_{eq}=\frac{176}{n}$

$\frac{220}{5}=\frac{176}{n}$
$n=4$