Question

If five equal pieces of $25\Omega$ are connected in parallel, then their equivalent resistance will be............

• A. $25\Omega$
• B. $1\Omega$
• C. $5\Omega$
• D. $\frac{1}{5}\Omega$

Answer 1

The correct option is C $5\Omega$

$\frac{1}{R_{equivalent}}$$=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+\frac{1}{R_4}+\frac{1}{R_5}$

Here $R_1=R_2=R_3=R_4=R_5=25$

$\frac{1}{R_{equivalent}}=\frac{5}{25}$

$R_{equivalent}=\frac{25}{5}=5ohm$