TS EAMCET20185 May 2018Morning ShiftPhysicsMagnetic Effects of CurrentActual
A steady current I flows through a wire with one end at O and the other end extending upto infinity as shown in the figure. The magnetic field at a point P , located at a distance d from O is
Options
- A₀ I 4 d (1- )
- B₀ l 2 d (1- )
- C₀ l 4 d
- D₀ I 4 d (1- )
Correct answer
D. ₀ I 4 d (1- )
Step-by-step solution
From result of field of a long wire, we have = ₀ 4 I r ( ₁- ₂ ) Here, aligned r & =d ₁ & = 90^ =1 ₂ & = (90- )= aligned So, = ₀ I 4 d (1- )