1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A long wire A carries a current of 10 amp. Another long wire B, which is parallel to A and separated by 0.1 m from A, carries a current of 5 amp in the opposite direction to that in A. What is the magnitude and nature of the force experienced per unit length of B [μ0=4π×10−7weber/amp−m]

A
Repulsive force of 104N/m
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
Attractive force of 104N/m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Repulsive force of 2π×105N/m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Attractive force of 2π×105N/m
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A Repulsive force of 10−4N/m By using Fl=μ04π.2i1i2a ⇒ Fl=10−7×2×10×50.1=10−4N Wires are carrying current in opposite direction so the force will be repulsive.

Suggest Corrections
0
Join BYJU'S Learning Program
Related Videos
Force on a Current Carrying Conductor in a Magnetic Field
PHYSICS
Watch in App
Join BYJU'S Learning Program