Electric Circuits is one of 9 topics in the Grade 11 Technical Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. Which equation correctly defines electric current?
I = Q/t
I = Qt
I = Q+t
I = t/Q
Answer: I = Q/t — Current is defined as the rate of flow of charge, I = Q/t, where Q is charge in coulombs and t is time in seconds.
Easy
2. In which direction does conventional current flow in a circuit?
From the positive terminal, through the external circuit, to the negative terminal
From the negative terminal, through the external circuit, to the positive terminal
In the same direction as electron flow
Conventional current has no defined direction
Answer: From the positive terminal, through the external circuit, to the negative terminal — By convention, conventional current is taken to flow from the positive terminal of a cell, through the external circuit, to the negative terminal.
Medium
3. Give ONE term for the potential difference across a cell when the circuit is open (no current flowing).
Answer: emf — Emf (electromotive force) is defined as the potential difference across a cell when the circuit is open, with no current flowing.
