Magnetics 3 Question 6

6. Two thin long parallel wires separated by a distance b are carrying a current i ampere each. The magnitude of the force per unit length exerted by one wire on the other is (1986,2M)

(a) μ0i2b2

(b) μ0i22πb

(c) μ0i2πb

(d) μ0i2πb2

Show Answer

Answer:

Correct Answer: 6. (b)

Solution:

  1. Force per unit length between two wires carrying currents i1 and i2 at distance r is given by

|Fl=μ02πi1i2r

 Here, i1=i2=i and r=bFl=μ0i22πb



NCERT Chapter Video Solution

Dual Pane