AP EAMCET202316 May 2023Morning ShiftPhysicsMagnetic Effects of CurrentActual
The force acting per unit length when a very long straight conductor is carrying a steady current of 1 ~A and the direction of the current is from south to north is (The horizontal component of the earth's magnetic field at the place is 3 10⁻⁵ ~T and the direction of the field is from the geographical south to geographical north.)
Options
- A3 10⁻⁵ Nm ⁻¹
- B1 10⁻⁵ Nm ⁻¹
- C0
- D1.5 10⁻⁵ Nm ⁻¹
Correct answer
A. 3 10⁻⁵ Nm ⁻¹
Step-by-step solution
aligned & Steady current, i =1 ~A & Magnetic field B =3 10⁻⁵ ~T & ~F = il B = ilB & F 1 = iB 90 & =1 3 10⁻⁵ 1 & =3 10⁻⁵ ~N / m aligned