MHT CET202416 May 2024Evening ShiftPhysicsMagnetic Effects of CurrentActual
A current 'I' flows in anticlockwise direction in a circular arc of a wire having ( 3 4 )^ th of circumference of a circle of radius R. The magnetic field ' B ' at the centre of circle is ( ₀= permeability of free space)
Options
- A₀ I 3 R in upward direction
- B₀ I 2 R in downward direction
- C3 ₀ I 8 R in downward direction
- D3 ₀ I 8 R in upward direction
Correct answer
D. 3 ₀ I 8 R in upward direction
Step-by-step solution
Magnetic field due to angle B= 2 ₀ I 2 R aligned & = 3 4 2 r= 3 2 & B= 3 4 ₀ I 2 R = 3 ₀ I 8 R aligned