TS EAMCET20185 May 2018Morning ShiftPhysicsMagnetic Effects of CurrentActual
The magnetic induction at point O of the given infinitely long current carrying wire shown in the figure below is
Options
- A₀ l 4 R (1- 3 2 )
- B₀ l 2 R(1+ )
- C₀ l 4 R [1+ 3 2 ]
- D₀ l 4 R
Correct answer
C. ₀ l 4 R [1+ 3 2 ]
Step-by-step solution
Magnetic field at point O= Magnetic field of wire 1+ magnetic field of loop aligned & = ₀ I 4 R + ₀ I 4 R ( 3 2 )= ₀ I 4 R + 3 8 ₀ I R & = ₀ I 4 R (1+ 3 2 ) aligned