Question

Two parallel infinite wires separated by ‘d’ carrying currents $I_1$ & $I_2$. Find the distance of third infinite long wire kept parallel to both wires so that it can stay in equilibrium - (X = ?)

• A. $\frac{I_{2}}{I_{2} -I_{1}} d$
• B. $\frac{I_{1}}{I_{2} + I_{1}} d$
• C. $\frac{ 2 I_{2}}{I_{2} -I_{1}} d$
• D. $\frac{ I_{2}}{I_{2} -I_{1}} d$

Answer 1

Answer: (B)

Correct answer is (b) $\frac{I_{1}}{I_{2} + I_{1}} d$