Question

Three equal resistances each of value R are joined as shown in the figure. The equivalent resistance between M and N is

• A. R
• B. 2R
• C. $\frac{R}{2}$
• D. $\frac{R}{3}$

Answer 1

Answer: (D)

$\frac{R}{3}$

Answer 2

Three resistances are in parallel.

∴ $\frac{1}{R'} = \frac{1}{R} + \frac{1}{R} + \frac{1}{R} = \frac{3}{R}$

The equivalent resistance $R' = \frac{R}{3}\Omega$