NEET2019PhysicsMagnetic Effects of CurrentActual
A semicircular arc of radius r and a straight wire along the diameter, both are carrying same current i . Find out magnetic force per unit length on the small element P , which is at the centre of curvature.
Options
- A( ₀ i^2 4 r )
- B( ₀ i^2 2 r )
- C( ₀ i^2 r )
- D( 2 ₀ i^2 r )
Correct answer
A. ( ₀ i^2 4 r )
Step-by-step solution
The magnetic force on a conductor, F=B i Magnetic force per unit length, F =B i= ( ₀ i^2 4 r )