Exam-style question
Try this first
If a resistor has a resistance of 10 Ω and a current of 2 A flows through it, what is the power dissipated in the resistor? Scenario focus: a resistor heating experiment, where power must be described as the rate of energy transfer.
Model answer
What a good answer should say
- The power dissipated in the resistor is 40 W.
Explanation
Why this works
The correct answer is The power dissipated in the resistor is 40 W.. In this version, the deciding idea is a resistor heating experiment, where power must be described as the rate of energy transfer.
That makes the correct option the one that uses the appropriate electricity quantity and unit, while the distractors either swap related circuit quantities or apply a rule from the wrong circuit situation.
Common mistake
No common mistake is linked to this question yet.