- #1

DottZakapa

- 239

- 17

- Homework Statement
- The distance between two parallel long wires, carrying currents equal to i and 3i respectively, is d as shown in the picture. What is the distance from the wire carrying the current i at which the magnetic field is zero

- Relevant Equations
- guess biot-savarat

**Homework Statement:**The distance between two parallel long wires, carrying currents equal to i and 3i respectively, is d as shown in the picture. What is the distance from the wire carrying the current i at which the magnetic field is zero

**Homework Equations:**guess biot-savarat

Being two long straight wires i can apply Biot-Savart equation. The currents are flowing in the same direction, hence at some point in between the sum of the two magnetic fields cancels.

My attempt

μ

_{0}i/(2πd)=μ

_{0}3i/(2πd

_{1})

and solve for d.

But does not leads to the correct solution. can't spot the mistake.