Two long, straight, parallel conductors and are placed apart in air. Conductor…

PHYSICS · Subjective · CBSE · Physics · Magnetic Effects of Electric Current · Magnetic Effects of Electric Current

Problem

Two long, straight, parallel conductors

X

and

Y

are placed

6\,\text{cm}

apart in air. Conductor

X

carries a current of

6\,\text{A}

upward while conductor

Y

carries a current of

6\,\text{A}

downward. (a) Using a suitable expression, find the magnitude of the magnetic field produced by conductor

X

at the midpoint

M

of the line joining the two wires. (b) Find the magnitude of the magnetic field produced by conductor

Y

at the same point

M

. (c) Determine the magnitude and direction of the net magnetic field at

M

due to the two conductors taken together. Show your reasoning clearly with the help of sketches. (d) If the current in

Y

is also reversed to flow upward, find the new magnitude and direction of the net magnetic field at

M

. Briefly explain the physical reason for the change observed.