Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Current Electricity

Question:

Options:

a

b

c

d

Correct Answer:

d

Explanation:

This is a balanced wheatstone bridge so no current will flow through the branch containing resistance R'.

Equivalent resistance is $R_{eq} = \frac{2R.4R}{2R + 4R} = \frac{4R}{3}$

$R_{eq}$ is independent of R'.