Question 1
A student investigated how the current in a filament lamp varies with the potential difference across the lamp.
Figure 1 shows the circuit used.
What is component P ?
[1 mark]
Complete the sentences.
Choose answers from the box.
The ammeter in the circuit measures.
The voltmeter in the circuit measures.
[2 marks]
How will increasing the resistance of the variable resistor in Figure 1 affect each of the following quantities?
Tick (✓) one box in each row.
[3 marks]
A charge flow of 15 coulombs passed through the filament lamp in a time of 60 seconds.
Calculate the current in the lamp.
Use the equation:
[2 marks]
When the current in the filament lamp is 0.12 A, the potential difference across the lamp is 6.0 V.
Calculate the resistance of the filament lamp.
Use the equation:
[2 marks]
The student repeated the investigation after replacing the lamp with a resistor at constant temperature and then a diode.
The student plotted a graph for each component.
Draw one line from each component to its graph.
[2 marks]
Figure 2 shows an ammeter.
The ammeter is not connected to a circuit.
What type of error does the ammeter display?
Tick (✓) one box.
[1 mark]