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Electricity Revision Worksheet

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Electricity Revision Worksheet

Electrical circuit diagram

⚡ Part 1: Ohm's Law and Calculations

Success Criteria: I can use Ohm's Law (V = I × R) to calculate voltage, current, and resistance.

1. What is Ohm's Law? Write the formula and explain what each letter represents.
2. A circuit has a voltage of 12V and a current of 3A. Calculate the resistance.

Show your working:

Answer: __________ Ω (ohms)

3. If a resistor has 6Ω resistance and 2A current flows through it, what is the voltage?

Answer: __________ V (volts)

4. Choose the correct unit for each electrical quantity:

Current is measured in:

Volts
Amperes
Ohms

Voltage is measured in:

Volts
Amperes
Ohms

Resistance is measured in:

Volts
Amperes
Ohms

📊 Part 2: Graphs and Power

Success Criteria: I can interpret electrical graphs and calculate power using P = V × I.

5. Draw a simple graph showing the relationship between voltage (x-axis) and current (y-axis) for a resistor following Ohm's Law.
6. A light bulb operates at 240V and draws 0.5A of current. Calculate the power consumed.

Power formula: P = V × I

Answer: __________ W (watts)

7. Which factors affect the resistance of a wire? Tick all that apply:

Length of the wire

Thickness of the wire

Material the wire is made from

Colour of the wire

Temperature of the wire

🔬 Part 3: Practical Reflection

Success Criteria: I can reflect on practical electricity investigations and explain safety considerations.

8. Describe one practical investigation you did during this electricity unit. What did you discover?
9. Why is electrical safety important? List three safety rules when working with electricity.

1. ________________________________

2. ________________________________

3. ________________________________

10. In series circuits, current is __________ throughout the circuit, but in parallel circuits, current __________ at junctions.

the same; splits

different; stays the same

the same; increases

zero; decreases

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