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WorksheetsInvestigating resistance practical
Total questions: 32
Worksheet time: 23mins
What is the unit of resistance?
How do you calculate resistance?
Current x Voltage
Voltage x Power
Voltage ÷ Current
Current ÷ Voltage
Why should you switch off the power between taking readings?
The wire will break
The power will run out
The wire will get hot
To stop wasting energy
What effect does a hotter temperature have on resistance?
No effect
Increases resistance
Decreases resistance
Stays the same
What other factor of a wire could affect its resistance?
Material its made of
How shiny it is
Colour
How do you calculate current from voltage and resistance?
Current = voltage x resistance
Current = resistance x power
Current = voltage ÷ resistance
Current = resistance ÷ voltage
What is the resistance if the current is 2A and the voltage is 10V?
8 Ω
20 Ω
12 Ω
5 Ω
If the current through a resistor is 2A and the voltage across it is 12V, what is the resistance
12Ω
6Ω
24Ω
0.167Ω
If a circuit has two resistors in series both are 4Ω, what is the total resistance of the circuit?
1Ω
2Ω
4Ω
8Ω
What effect do electrons flowing through a resistor have on the resistor.
make it glow
reduce it's resistance
increase it's resistance
heat it up
in which circuit is the lamp brightest
1
2
3
All the same
What is the unit of Current?
Ohm, Ω
Amp, A
Volt, V
Joule, J
What is the unit of Potential Difference?
Ohm, Ω
Amp, A
Volt, V
Joule, J
Which has a higher resistance?
Conductors
Insulators
What is the unit of Current?
Ohm, Ω
Amp, A
Volt, V
Joule, J
What is the unit of Potential Difference?
Ohm, Ω
Amp, A
Volt, V
Joule, J
What is the unit of Resistance?
Ohm, Ω
Amp, A
Volt, V
Joule, J
Which has a higher resistance?
Conductors
Insulators
Which has a higher resistance?
Conductors
Insulators
What is the resistance of a bulb which has a potential difference of 8V, and a current of 2A
6 Ω
4 Ω
2 Ω
10 Ω
What is the resistance of a buzzer which has a potential difference of 12V, and a current of 2A?
6 Ω
4 Ω
14 Ω
10 Ω
What is the resistance of a swtich which has a potential difference of 6 V, and a current of 0.5 A?
6 Ω
12 Ω
3 Ω
9 Ω
What device do we use to measure the current through a circuit?
(a)
What device do we use to measure the potential difference across a component?
(a)
If your voltmeter reading is 3V across bulb 1, and your ammeter reads 1A, what is the Resistance of bulb 1?
2 Ω
3 Ω
4 Ω
0.333 Ω
What is the resistance of bulb 2?
4 Ω
3 Ω
2 Ω
1 Ω
What is the total resistance of both bulbs?
6 Ω
4Ω
3Ω
7 Ω
If your voltmeter reading is 3V across bulb 1, and your ammeter reads 1A, what is the Resistance of bulb 1?
2 Ω
3 Ω
4 Ω
0.333 Ω
What is the resistance of bulb 2?
4 Ω
3 Ω
2 Ω
1 Ω
What is the total resistance of both bulbs?
6 Ω
4Ω
3Ω
7 Ω
The total resistance in this circuit is
100 ohms
450 ohms
400 ohms
30 ohms
