Exam-style question
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An AC circuit has an rms voltage of 120 V and a resistance of 30 Ω. Calculate the power dissipated in the circuit. Scenario focus: magnetic fields in a distinct A-Level Physics fields context; identify the field quantity, source, direction, and unit before selecting the answer.
Model answer
What a good answer should say
- The power dissipated in the circuit is 480 W.
Explanation
Why this works
The correct answer is The power dissipated in the circuit is 480 W.. This is correct for Magnetic fields because the stem is testing magnetic fields; the chosen option keeps the field quantity, source interaction, direction, and unit consistent.
The alternatives are weaker because they mix gravitational, electric, magnetic, orbital, or transformer ideas, or they attach the right number to the wrong physical meaning.
Common mistake
No common mistake is linked to this question yet.