1
1 mark
1 markA graph of current against potential difference for an electrical component is shown.
Which component would give this graph?
diode
filament bulb
ohmic conductor
thermistor
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Current, Potential Difference, Resistance & Power (Edexcel International AS Physics)
Exam Questions
43 mins10 questions21 mark
1 markWhich of the following units is equivalent to the volt?
J s–1
W s–1
J C–1
W C–1
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31 mark
1 markThe graph shows how potential difference 
varies with current 
for an electrical component.
Which electrical component is represented by this graph?
diode
filament lamp
ohmic conductor
thermistor
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11 mark
1 markThe unit of resistance is the ohm.
Which of the following is equivalent to the ohm?
JC−2 s
JC2 s−1
JC−1 s−1
JCs
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21 mark
1 markThe graph shows how current I varies with potential difference V for an electrical component.
Which component is represented by this graph?
Diode
Filament lamp
Ohmic conductor
Thermistor
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31 mark
1 markA light dependent resistor (LDR) and a fixed resistor are connected in a circuit, as shown.
The intensity of the light incident on the LDR is increased.
Which of the following does not take place as the light intensity is increased?
The current in the circuit increases.
The potential difference across the fixed resistor increases.
The total power dissipated in the circuit decreases.
The resistance of the LDR decreases.
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