JEE Main20246 Apr 2024Morning ShiftPhysicsMagnetic Effects of CurrentActual
An element l= x i is placed at the origin and carries a large current I=10 ~A . The magnetic field on the y -axis at a distance of 0.5 ~m from the elements x of 1 ~cm length is:
Options
- A4 10⁻⁸ ~T
- B10 10⁻⁸ ~T
- C8 10⁻⁸ ~T
- D12 10⁻⁸ ~T
Correct answer
A. 4 10⁻⁸ ~T
Step-by-step solution
aligned dB & = ₀ I 4 ( d l r ) r ^3 ( Tesla) & = 10⁻⁷ 10 ( 1 2 1 100 )(+ k ) ( 1 2 )^3 =4 10⁻⁸ ~T (+ k ) aligned