AP EAMCET202018 Sep 2020Morning ShiftPhysicsMagnetic Effects of CurrentActual
A horizontal overhead powerline at a height of (5 ~m ) from the ground and carries a current of (150 ~A ) from East to West. The magnetic field directly below it on ground is
Options
- A(6 10⁻⁶ ~T ), towards South
- B(6 10⁻⁶ ~T ), towards West
- C(7 10⁻⁶ ~T ), towards East
- D(8 10⁻⁷ ~T ), towards North
Correct answer
A. (6 10⁻⁶ ~T ), towards South
Step-by-step solution
Magnetic field below the wire on the ground is given as ( aligned B & = ₀ 2 I r & =2 10⁻⁷ 150 5 [ ₀=4 10⁻⁷ TmA ⁻¹ ] & =6 10⁻⁶ ~T ~( toward South ) aligned )