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WorksheetsSensor Circuits
Total questions: 15
Worksheet time: 8mins
In a potential divider circuit there must be
At least 1 resistor
At least 2 resistors
A switch
A thermistor
How many volts would the 15Ω resistor get?
2V
4V
6V
8V
Here, we have a 12 V battery. There are 2 resistors in series. The voltmeter measuring across one resistor measures 8V. Therefore, how many volts would the other resistor get?
0v
4v
8v
12v
How does the resistance of this component change as the temperature goes UP
Goes up as well
Is unchanged
Goes down
In this circuit, how will the amount of voltage the thermistor gets change as the temperature of the circuit goes up. Hint- First consider how it's resistance changes, and it's volts will change the same way!
It will get more volts
The volts it gets will not change
It will get less volts
The circuit will stop working
Here, we have a 12 V battery. There are 2 resistors in series.
The voltmeter measuring across resistor 1 measures 8V. We know resistor 2 now gets 4V.
If resistor 2 has a resistance of 60Ω, what is the resistance of resistor 1?
0Ω
60Ω
80Ω
120Ω
Name the 4 components in this circuit
Variable resistor, cell, bulb, light dependent diode
Variable resistor, battery, bulb, light dependent diode
Fixed resistor, cell, bulb, light dependent diode
Fixed resistor, cell, bulb, light dependent resistor
How does the resistance of the LDR (Light dependent resistor) change as MORE light is shone on it
Doesn't Change
Goes up
Goes down
Breaks
Ok, so we know the resistance of the LDR goes DOWN as more light is shone on it. How would this affect the share of the volts the LDR gets?
Doesn't Change
Goes up
Goes down
Breaks
Ok, so we know the resistance of the LDR goes DOWN as more light is shone on it. How would this affect the share of the volts the light bulb gets, considering it is in parallel with the LDR (remember rules for volts in parallel)
Doesn't Change
Goes up
Goes down
Breaks
Which one is the variable resistor
A
B
C
How does the current flowing in a thermistor change when it's temperature increases
Goes down
Stays the same
Goes up
Which one of the following is most likely to include a thermistor?
An automatic circuit to switch a plant watering system on and off
An automatic circuit to switch an outside light on when it gets dark.
An automatic circuit to switch a heating system on and off.
What is this a resistance graph for
Thermistor
Light emitting diode
Light dependent resistor
Light bulb
Use the graph to find the resistance of the component when the light intensity is 20 lux.
20 kΩ
25 kΩ
30 kΩ
35 kΩ
