Use the right hand rules to show that the force between the two loops in Figure 22.49 is attractive if the currents are in the same direction and repulsive if they are in opposite directions. Is this consistent with like poles of the loops repelling and unlike poles of the loops attracting? Draw sketches to justify your answers.
From right hand thumb rule, the South Pole of the current carrying upper loop is near the North Pole of lower loop. Since South Pole of upper and North Pole of lower loop are unlike pairs of loop, they will attract each other.
If the current flowing in parallel placed loops is in same direction, the force between the loops will be attractive.