Level 1: Core Concepts Check (Aiming for a Pass - 'S')

1. Define: What is electric current?

2. Define: What is potential difference (voltage)?

3. Define: What is resistance?

4. State: What is Ohm's Law? (in words or as a formula).

5. Identify: What is the unit of resistance?

6. Draw: Draw the circuit symbol for a cell, a bulb, and a switch.

7. Recall: How is an ammeter connected in a circuit?

8. Recall: How is a voltmeter connected in a circuit?

9. State: What is the formula for the total resistance of resistors in series?

Level 2: Connecting the Dots (Aiming for a Credit - 'C')

1. Calculate: A 12 V battery is connected to a 4 Ω resistor. What is the current that flows?

2. Explain: Two bulbs are connected in series to a battery. If one bulb breaks, what happens to the other bulb? Explain why.

3. Calculate: Three resistors of 2 Ω, 3 Ω, and 5 Ω are connected in series. What is their total resistance?

4. Calculate: Two resistors of 10 Ω and 10 Ω are connected in parallel. What is their total resistance?

5. Explain: Why are the lights in a house wired in parallel and not in series? Give two reasons.

Level 3: Exam Challenge (Aiming for a Distinction - 'A'/'B')

1. Circuit Analysis: A circuit is set up with a 12 V battery. It has a 2 Ω resistor and a 4 Ω resistor connected in series. (a) Draw the circuit diagram. (b) Calculate the total resistance of the circuit. (c) Calculate the total current flowing from the battery. (d) Calculate the potential difference (voltage) across the 4 Ω resistor only.