99 Percentile Qs Bank for JEE MainPhysicsMagnetic Effects of Current
Two magnetic dipoles X and Y are kept at a distance d apart, with their axes perpendicular to each other. The dipole moment of Y is twice that of X . P is a point along the horizontal line which is at the midpoint of d . What is the magnitude of the force of particle of charge q passing through P at angle θ = 45 ° ? ( d is very much larger in comparison to dipole)
Options
- A2 μ 0 4 π M ( d / 2 ) 3 × q v
- Bμ 0 4 π 2 M ( d / 2 ) 3 × q v
- Cμ 0 π M ( d / 2 ) 3 × q v
- D0
Correct answer
D. 0
Step-by-step solution
B 1 = 2 μ 0 4 π · M ( d / 2 ) 3 ; B 2 = μ 0 4 π · 2 M ( d / 2 ) 3 ⇒ B 1 = B 2 ∴ Net magnetic field will be at 45 ° . ∴ The direction of B n e t and velocity of charge is same, hence charge will experience no force.