NEET2005PhysicsMagnetic Effects of CurrentActual
A coil having N turns carry a current as shown in the figure. The magnetic field intensity at point P is
Options
- A₀ N i R^2 2 (R^2+x^2 )^ 3 / 2
- B₀ N i 2 R
- C₀ N i R^2 (R+x)^2
- Dzero
Correct answer
A. ₀ N i R^2 2 (R^2+x^2 )^ 3 / 2
Step-by-step solution
From the formula, magnetic field intensity at point P , shown in given figure while coil carry current i and having N turns is given by ₀ N i R^2 2 (R^2+x^2 )^ 3 / 2