Do you know the difference between a thermistor and an LDR?
Electrical Resistance Quiz
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Question 1 of 14Question 1
Which is the correct formula for the relationship between potential difference (voltage), resistance and current?
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Question 2 of 14Question 2
Which of the following are the correct units for resistance?
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Question 3 of 14Question 3
When resistance increases but voltage stays the same what happens to the current?
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Question 4 of 14Question 4
Calculate the voltage when resistance = 7.5 and current = 15.4.
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V
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Question 5 of 14Question 5
Calculate the current when resistance = 5 and voltage = 10
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A
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Question 6 of 14Question 6
Which component can be used to change the resistance of a circuit?
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Question 7 of 14Question 7
When multiple resistors are connected in series, how does the total resistance of the circuit change?
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Question 8 of 14Question 8
When multiple resistors are connected in parallel, how does the total resistance of the circuit change?
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Question 9 of 14Question 9
When testing and measuring using series circuits, which component is used to adjust the current?
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Question 10 of 14Question 10
Drag and drop to match the way voltage changes with current, with the component
- Fixed resistor
- Filament lamp
- Current and voltage change by the same percentage – directly proportional
- Current and voltage change by different percentages as the component gets hot – not directly proportional
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Question 11 of 14Question 11
Which of the following statements is correct:
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Question 12 of 14Question 12
How does the resistance of a light dependant resistor (LDR) change with light intensity?
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Question 13 of 14Question 13
How does the resistance of a thermistor change as the temperature changes?
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Question 14 of 14Question 14
If voltage or current changes for filament lamps, diodes, thermistors and LDR’s, which components do we need in a circuit to explore the effects on resistance?
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Electrical Resistance - Equations
The equation that links resistance, voltage (potential difference) and current is:
V = IR
This can be rearranged to get current:
I = V/R
Or resistance:
R = V/I
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