KCET2020PhysicsMagnetic Effects of Current
The magnetic field at the origin due to a current element i d l placed at a point with vector position r is
Options
- A₀ i 4 d l r r³
- B₀ i 4 r d 1 r³
- C₀ i 4 d l r r²
- D₀ i 4 r d l r²
Correct answer
A. ₀ i 4 d l r r³
Step-by-step solution
According to Biot-Savart's law, magnetic field at the origin due to a current element i d l placed at a point with position vector r is given as. B= ₀ i 4 d l r r³