Exam-style question
Try this first
If a charged particle enters a magnetic field perpendicularly, what happens to its speed? Scenario focus: transformers in a distinct A-Level Physics fields context; identify the field quantity, source, direction, and unit before selecting the answer.
- A.It increases
- B.It decreases
- C.It remains constant
- D.It becomes zero
Model answer
What a good answer should say
- It remains constant
Explanation
Why this works
The correct answer is It remains constant. This is correct for Magnetic fields because the stem is testing transformers; 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.