An engineer wishes to measure first the electric current flowing through a resistor, and then determine the electrical charge passing through the resistor in a measured time interval.
She has the resistor, a battery, a stopwatch, and some connecting wires.
What else does she need?
a voltmeter only
an ammeter only
both an ammeter and a voltmeter
a pH meter and an ammeter
51 exam-style questions on CIE IGCSE Physics 4.2.2a Electric current, charge and measuring current. Each one has a worked solution and a mark scheme showing where the marks go.