Q92 / 160 · JIPMER 2014 · Physics
Find equivalent resistance between $X$ and $Y$
- Correct answerA$R$
- B$R / L$
- C$2 R$
- D$5 R$
Solution
The given circuit can be shown in the following way. No, current will be flown in the middle resistance.
Equivalent resistence of $R$ and $R^{\prime}=2 R$
Total resistance $\frac{1}{R^{\prime}}=\frac{1}{2 R}+\frac{1}{2 R}$
$R^{\prime}=R$
Equivalent resistence of $R$ and $R^{\prime}=2 R$
Total resistance $\frac{1}{R^{\prime}}=\frac{1}{2 R}+\frac{1}{2 R}$
$R^{\prime}=R$Hence, the correct answer is option: 'A'.