MHT CET202416 May 2024Evening ShiftPhysicsMagnetic Effects of CurrentActual
An arc of a circle of radius ' R ' subtends an angle 2 at the centre. It carries a current I . The magnetic field at the centre will be ( ₀= permeability of free space)
Options
- A₀ I 2 R
- B₀ I 8 R
- C₀ I 4 R
- D2 ₀ I 5 R
Correct answer
B. ₀ I 8 R
Step-by-step solution
The magnetic field due to current carrying circular arc is B= ₀ I 2 r ( 2 ) Here, = 2 aligned B & = ₀ I 2 r ( 1 2 2 ) B & = ₀ I 2 r ( 1 4 ) B & = ₀ I 8 r aligned