# NEET Questions Solved

PMT - 1997

In the arrangement of resistances shown below, the effective resistance between points A and B is

(1) 20 Ω

(2) 30 Ω

(3) 90 Ω

(4) 110 Ω

(1) By the concept of balanced Wheatstore bridge, the given circuit can be redrawn as follows

${R}_{AB}=\frac{30×60}{\left(30+60\right)}=20\text{\hspace{0.17em}\hspace{0.17em}}\Omega$

Difficulty Level:

• 56%
• 19%
• 16%
• 11%