⚡ Part 1: Understanding Electrical Circuits

WALT: Understand voltage, current, and resistance in electrical circuits

1. Match each term to its correct description:

Voltage: _________________________

Current: _________________________

Resistance: _________________________

Word Bank: electrical pressure, flow of electric charge, restriction to current flow

2. Draw a simple circuit with a battery, resistor, and bulb in the box below:

Remember: Use lines for wires, a rectangle for the resistor, a circle with an X for the bulb, and parallel lines for the battery.

🔢 Part 2: Ohm's Law Calculations

Ohm's Law Formula: V = I × R

Where: V = Voltage (volts), I = Current (amperes), R = Resistance (ohms)

3. Example: If current = 2 amperes and resistance = 5 ohms, find voltage:

V = I × R

V = 2 × 5

V = 10 volts

4. Calculate the voltage when current = 3 amperes and resistance = 4 ohms:

5. A circuit has a voltage of 12 volts and resistance of 6 ohms. Calculate the current:

Hint: Rearrange the formula to I = V ÷ R

6. Complete this table using Ohm's Law:

Voltage (V)	Current (I)	Resistance (R)
9 volts	3 amperes	______ ohms
______ volts	2 amperes	8 ohms
15 volts	______ amperes	5 ohms

🔬 Part 3: Circuit Analysis

7. What happens to current when resistance increases in a circuit? Tick the correct answer:

Current increases

Current decreases

Current stays the same

8. Explain why a thick wire has less resistance than a thin wire:

9. Extension Challenge: A torch uses a 6-volt battery. If the bulb has a resistance of 12 ohms, how much current flows through the circuit? Show your working:

10. Draw a circuit diagram showing where you would place a multimeter to measure current in a circuit:

Hint: Current meters are connected in series (in line) with the circuit.

Ohm's Law Circuits

Ohm's Law Circuits

⚡ Part 1: Understanding Electrical Circuits

🔢 Part 2: Ohm's Law Calculations

🔬 Part 3: Circuit Analysis

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