Do you know the difference between a thermistor and an LDR?
Electrical Resistance Quiz
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Which is the correct formula for the relationship between potential difference (voltage), resistance and current?CorrectIncorrect
Which of the following are the correct units for resistance?CorrectIncorrect
When resistance increases but voltage stays the same what happens to the current?CorrectIncorrect
Calculate the voltage when resistance = 7.5 and current = 15.4.
Calculate the current when resistance = 5 and voltage = 10
Which component can be used to change the resistance of a circuit?CorrectIncorrect
When multiple resistors are connected in series, how does the total resistance of the circuit change?CorrectIncorrect
When multiple resistors are connected in parallel, how does the total resistance of the circuit change?CorrectIncorrect
When testing and measuring using series circuits, which component is used to adjust the current?CorrectIncorrect
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
Which of the following statements is correct:CorrectIncorrect
How does the resistance of a light dependant resistor (LDR) change with light intensity?CorrectIncorrect
How does the resistance of a thermistor change as the temperature changes?CorrectIncorrect
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?CorrectIncorrect
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
R = V/I