Two long parallel conductors separated by a certain distance 'd' and carrying steady currents $I_1$ and $I_2$ are shown in figures. Choose the correct statement.
Answer & explanation
Correct answer: option 2
If the currents are flowing in the same direction, the magnetic field set up in one produces an attractive force on the other.
If the currents are flowing in the opposite direction, the magnetic field set up in one produces an repulsive force on the other.