Do not just check the answer; read the why.

A1. Answer: B Explanation: In a series circuit, there is only one path for electrons. The number of electrons passing point A per second equals the number passing point B. Current is constant.

A2. Answer: C (6V) Explanation: The "top rule" for parallel circuits: Voltage is the same across every branch. The battery pushes 6V, so every component gets the full 6V.

A3. Answer: B (Series) Explanation: An ammeter measures flow through a component. To measure how many electrons go through a bulb, you must break the wire and put the ammeter in the same path (series). Putting it in parallel creates a short circuit.

A4. Worked Solution:

A5. Answer: 1.8V Explanation: In series, voltages add up to the battery voltage. ( V_battery = V_L1 + V_L2 ) ( 3V = 1.2V + V_L2 ) ( V_L2 = 1.8V )

A6. Check your drawing against these rules:

A7. Answer: 3 Amperes (A) Explanation: Branch 1: V=9V, R=3Ω. I = 9/3 = 3A.

A8. Answer: 1.5 A Explanation: Branch 2: V=9V, R=6Ω. I = 9/6 = 1.5A.

A9. Answer: 4.5 A Explanation: Total current = Sum of branch currents. ( I_total = 3A + 1.5A = 4.5A ).

A10. Answer: They stay the same brightness. Explanation: This is the top trick question in F2 science.

Don't ignore the safety section! It often appears in the "structure" part of exercises. Know your wires by color:

The Fuse: Always placed on the Live wire. It melts and breaks the circuit if the current gets too high, protecting the device and preventing fire.

Common question:
Draw a circuit with a battery, switch, bulb, ammeter (to measure current through bulb), and voltmeter (to measure voltage across bulb).

Correct arrangement:

Exercise: Identify the mistake: “A student connects a voltmeter in series with a bulb. What happens?”
(Answer: Very little current flows because voltmeter has high resistance; bulb barely lights.)

Before you tackle the exercises, make sure you understand these three pillars of Form 2 Electricity.

Study the circuit diagram described below (draw it yourself if needed):

Questions:

Are you a Form 2 student staring at a diagram of wires, bulbs, and batteries, wondering where the current goes? You aren't alone. The Electricity chapter is one of the most important—and sometimes confusing—topics in the Form 2 Science syllabus.

Whether you are preparing for your mid-year exams or just trying to finish your homework, this guide breaks down the "top" concepts you need to know to ace your F2 Science Electricity exercise.

Let’s switch on the power and get started!