Question

Two like magnetic poles of strength 10 and 40 S.I. units are separated by a distance 30cm. The intensity of magnetic field is zero on the line joining them:

• A. at a point 10 cm from the stronger pole
• B. at a point 20 cm from the stronger pole
• C. at the mid-point
• D. at infinity

Answer 1

Answer: (B)

at a point 20 cm from the stronger pole

Answer 2

Answer (b) at a point 20 cm from the stronger pole