AP EAMCET202420 May 2024Evening ShiftPhysicsMagnetic Effects of CurrentActual
Two long straight parallel conductors A and B carrying currents 4.5 A and 8 A respectively are separated by 25 cm in air. The resultant magnetic field at a point which is at a distance of 15 cm from conductor A and 20 cm from conductor B is
Options
- A2 10⁻⁵ ~N
- B2 10⁻⁴ ~N
- C10⁻⁵ ~N
- D10⁻⁴ ~N
Correct answer
C. 10⁻⁵ ~N
Step-by-step solution
aligned & I ₁=4.5 ~A , I ₂=8 ~A & r ₁=15 ~cm , r ₂=10 ~cm aligned Magnetic field at P is aligned & B = B ₂- B ₁ & = ₀ 2 ( I ₂ r ₂ - I ₁ r ₁ ) & =2 10⁻⁷ ( 8 10 - 4.5 15 ) 10^2=10⁻⁵ ~T aligned