Question 11
Observation
Part (a): Candidates performance was fair. Majority of the candidates were able to correctly define electric potential.
Part (b): Candidates performance was below average. Most candidates were able to state the reason why soft iron is used to produce permanent magnet.
Part (c) Candidates performance was fair.
Part (d): Performance was poor. Most candidates were unable to correctly solve the problem on conductivity of the wire.
Part (e): Performance was poor. Most candidates were unable to correctly solve the problem on electrical circuit.
The expected answer is:
11.(a) Electric Potential (V)
Electric potential is the work done in bringing a unit positive charge from infinity to that point (against the electrical force of the field)
(b) It readily/easily loses its magnetism.
(c) Relationship between resistivity and conductivity
Resistivity is the reciprocal of conductivity