AP EAMCET202317 May 2023Evening ShiftPhysicsMagnetic Effects of CurrentActual
The axial field ( B _ A ) and the equatorial field ( B _ E ) due to a short bar magnet at equal distances are related as
Options
- AB _ A =2 ~B _ E
- BB _ A =-2 ~B _ E
- CB _ A =- B _ E
- DB _ A =-2 B _ E
Correct answer
A. B _ A =2 ~B _ E
Step-by-step solution
aligned & B _E= ₀ ~m 4 r ^3 & ~B _ A = 2 ₀ ~m 4 r ^3 & B _ E B _ A = 1 2 B _ A =2 ~B _ E aligned