Physics 9702 · AS & A Level · Force on a moving charge
Force on a moving charge — practice question
A thin conducting slice is set at right angles to a uniform magnetic field, as shown in Fig. 8.1. The magnetic field is normal to face $CDEF$ and to face $PQRS$. The current $I$ in the slice is normal to faces $CDQP$ and $FERS$. A potential difference, the Hall voltage $V_H$, develops across the slice.
(a(i))[1]
State which faces have the Hall voltage $V_H$ across them.
(a(ii))[4]
Explain why a steady voltage $V_H$ is established between the faces you named in (i).
(b)[2]
Two slices have similar dimensions. One slice is made of a metal and the other slice is made of a semiconductor material. For the same values of magnetic flux density and current, state which slice, if either, gives the larger Hall voltage. Explain your reasoning.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “DERQ and CFSP rules are stated” …