Electric Circuits is one of 9 topics in the Grade 11 Physical 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. Ohm's Law is expressed by the formula:
V = IR
V = I + R
V = I/R
V = I - R
Answer: V = IR — Ohm's Law: V = IR, where V is potential difference, I is current, and R is resistance.
Easy
2. A conductor whose resistance remains constant regardless of the current or voltage (at constant temperature) is called:
An ohmic conductor
A non-ohmic conductor
An insulator
A semiconductor only
Answer: An ohmic conductor — An ohmic conductor obeys Ohm's Law, with a constant resistance regardless of current or voltage, at constant temperature.
Medium
3. A resistor has a current of 2 A flowing through it with a resistance of 5 Ω. Calculate the potential difference across the resistor, in volts, using V=IR.
