Q71 · Practice questionSimple familiar3 marks
QUESTION 71 (3 marks)
A straight wire carries to the right through a uniform magnetic field directed out of the page. Determine the magnitude and direction of the magnetic force on the wire.
WORKED SOLUTION
3 marksPractice marking scheme
ANSWER
downward.
Worked solution
The wire is perpendicular to the field, so
Using the right-hand rule for current to the right and magnetic field out of the page, points downward.
Uses magnetic-force equation.
Calculates correct magnitude.
Determines downward direction.
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