Question

The number of $160\Omega$ resistors to be connected in parallel to produce $5A$ current on a $100V$ line is:

• A. $2$
• B. $4$
• C. $8$
• D. $10$

Answer 1

The correct option is C $8$

If $n$ number of same resistance$\left(R\right)$ connected in parallel then the total resistance will be $=\frac{R}{n}$.

In the question the total resistance of the circuit should be $\frac{100}{5}=20\Omega$. Now the number of $160\Omega$ resistance needed is: $n=\frac{160}{20}=8$.