THE PRACTICE STUDIO
Go slowly. Ask why. Make it yours.
PRACTICE / Biot-Savart law
Reject the false between-wire zero
Two long straight wires pass through x=0 and x=0.12 m, perpendicular to the xy plane. Their signed currents along z are +3 A and −12 A respectively.
Where on the x axis is the resultant magnetic field zero?
Organize the givens & assumptions
- Wire 1: x=0, I_z=+3 A
- Wire 2: x=0.12 m, I_z=−12 A
Ideal long thin wires; nonmagnetic surroundings; no other fields; points on the wires themselves excluded.
- A
- B
- C
- D
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