Q208 · Practice questionComplex familiar1 mark
QUESTION 208
A conducting loop moves right into a uniform magnetic field directed into the page. At the shown instant it is partly inside the field. Viewed as drawn, what is the direction of the induced current?
(A)
Clockwise
(B)
No current is induced.
(C)
Counterclockwise
(D)
Alternates clockwise and counterclockwise while entering.
WORKED SOLUTION
1 markAnswer C
ANSWER
C. Counterclockwise
Worked solution
The into-page magnetic flux through the loop increases. Lenz's law requires an induced field out of the page, opposing that increase. A counterclockwise current produces an out-of-page field.
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 C.
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
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