Physics 5054 · O Level · Circuit diagrams and circuit components
Circuit diagrams and circuit components — practice question
A student is examining the current in a resistor that has a fixed resistance.
The apparatus available includes an ammeter, electrical connecting leads, a resistor of fixed resistance, a lamp, a switch, a variable resistor, a $6\,\text{V}$ battery, an LED, and a voltmeter.
(a)[1]
State which item of apparatus is used to measure current.
(b(i))[3]
The student records the current $I$ for a number of different potential differences. Draw a circuit diagram to show the arrangement used by the student. You may use all, or only some, of the apparatus provided.
(b(ii))[1]
Describe how the student produces different values of the potential difference across the fixed resistor.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “an ammeter” …