11 mark
Which symbol is used to show an LDR?
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3.2 Simple Circuits
21 mark
A student sets up four different circuits. He uses identical lamps and the same cell.
Look at the diagrams of his circuits.
Which circuit has the brightest lamp(s)?
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1
1 mark
1 markHere are some graphs for the potential difference (p.d.) of four electrical supplies.
Which graph shows a direct voltage?
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11 mark
Look at the circuit diagram.
- resistance = potential difference ÷ current
Calculate the resistance of bulb D.
2 Ω
4 Ω
6 Ω
8 Ω
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21 mark
A student investigates how current and potential difference vary in different components.
Look at the graphs of her results.
Which graph shows a filament lamp?
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31 mark
A student investigates how the resistance of a light dependent resistor (LDR) changes with light intensity.
Which graph shows the correct relationship between the resistance of an LDR and light intensity?
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