Q148 · Practice questionComplex familiar1 mark
QUESTION 148
An electron enters a uniform magnetic field with velocity to the right. The crosses represent a field into the page. What is the initial magnetic force direction?
(A)
Up the page
(B)
Down the page
(C)
Into the page
(D)
To the left
WORKED SOLUTION
1 markAnswer B
ANSWER
B. Down the page
Worked solution
For a positive charge, points up the page. The electron has negative charge, so its force points down.
Equivalent physically justified methods and consistent equivalent units accepted.
Displayed decimals are model answers; accept appropriate significant figures and consistent rounding from stated constants.
Select B.
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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