Two long straight current-carrying parallel wires cross the x axis and carry currents I and 3I in the same direction, as shown. At what value of x is the net magnetic field zero?
A) 0
B) 1
C) 3
D) 5
E) 7

Question

Two long straight current-carrying parallel wires cross the x axis and carry currents I and 3I in the same direction, as shown. At what value of x is the net magnetic field zero? 
A) 0 
B) 1 
C) 3 
D) 5 
E) 7

Quizplus · Accepted Answer

The Answer of Two long straight current-carrying parallel wires cross the x axis and carry currents I and 3I in the same direction, as shown. At what value of x is the net magnetic field zero? 
A) 0 
B) 1 
C) 3 
D) 5 
E) 7

Two Long Straight Current-Carrying Parallel Wires Cross the X Axis