Physics 5054 · O Level · Forces on a current-carrying conductor
Forces on a current-carrying conductor — practice question
An electric circuit is made up of a battery, a variable resistor and connecting wires. The sections PQ and QR of the connecting wire lie in a part of space with a uniform magnetic field. In Fig. 7.1, the shaded region shows the magnetic field.
(a)[2]
In the table, place one tick (✓) in each column to show the force on PQ and the force on QR.
(b)[2]
The battery in the circuit shown in Fig. 7.1 is reversed. State and explain what effect this has on PQ and QR.
(c)[1]
Suggest one effect of reducing the current.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “PQ force directed to the top of the page” …