MHT CET20242 May 2024Morning ShiftPhysicsMagnetic Effects of CurrentActual
Two identical current carrying coils with same centre are placed with their planes perpendicular to each other. If current I= 2 ~A and radius of the coil is R =1 ~m , then magnetic field at centre is equal to ( ₀= permeability of free space)
Options
- A₀
- B₀ 2
- C2 ₀
- D2 ₀
Correct answer
A. ₀
Step-by-step solution
aligned i & = 2 A B_ n e t & = B₁^2+B₂^2 & = ( ₀ i 2 R )^2+ ( ₀ i 2 R )^2 = 2 ( ₀ i 2 R )^2 & = 2 ₀^2 i ^2 4 R ^2 = 1 2 ( ₀ i R )^2 & = 1 2 ₀ i R = 1 2 ₀ 2 1 = ₀ aligned