Section 4.2: Charge & Current
Exam-Style Question Bank
Paper 2 (MCQ)
5
Questions
Paper 4 (Theory)
2
Questions
Paper 6 (Practical)
1
Question
A plastic rod is rubbed with a cloth and becomes negatively charged. Which statement correctly explains this?
The diagram shows two charged objects. Which pattern correctly shows the electric field lines?
A current of 2.0 A flows through a wire for 1.0 minute. Calculate the total charge that passes through the wire.
[3 marks]
A battery is connected to a lamp. In which direction do the electrons flow?
Copper is a good electrical conductor. Which property of copper atoms makes this possible?
A student investigates the relationship between current and charge. The student measures a constant current of 0.5 A flowing through a component.
(a) State the equation linking charge (Q), current (I), and time (t). [1 marks]
(b) Calculate how long it takes for 30 C of charge to pass through the component. [3 marks]
(c) The student uses a battery with a potential difference of 9 V. Calculate the energy transferred when 30 C of charge flows through the battery. [3 marks]
A student uses an ammeter to measure the current in a circuit. The diagram shows the ammeter reading.
(a) State the reading shown on the ammeter. [1 marks]
(b) The smallest division on this ammeter is 1 A. State the uncertainty in this measurement. [1 marks]
(c) Suggest one way the student could reduce the uncertainty in the current measurement. [1 marks]
📚 Key Mark Scheme Keywords for Section 4.2
Charging by Friction:
• Electrons transfer (NOT protons)
• Gained electrons = negative
• Lost electrons = positive
Electric Fields:
• Like charges repel
• Unlike charges attract
• Field lines never cross
Current & Charge:
• Q = I × t
• Current in Amperes (A)
• Charge in Coulombs (C)
• Time in seconds (s)
Conductors:
• Free/delocalized electrons
• Electrons flow − to +
• Conventional current flows + to −
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