Question

Figure 8 shows two straight conductors P and Q connected to a battery and a variable resistor.

1. Using arrows, indicate on the diagram the direction of current that flows through P and Q when the switch is closed. 
2. State what is observed as the current flows through the conductors. 
3. Explain the observation in (2). 

Answer 1

1.   
   
   on the diagram
2. The two conductors repel/ move away/ distance below conductors increases
3. As the current flows, a magnetic field develops around each conductor such that the field between the conductor reinforce each other creating a stronger force.