Unit: Electricity and Magnetism
Year: 1990 Question#: 39
Question: The diagram below represents a conductor carrying an electron current in magnetic field B. The direction of the magnetic force on the conductor is
(1 ) into the page
(2 ) out of the page
(3 ) toward the top of the page
(4 ) toward the bottom of the page
What is this question really asking?
Explanation by: Gabriel F
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Answer 1
into the page
CORRECT
Into the page is the the direction your palm faces when applying the thrid hand rule correctly. Remember: Left hand for negative charges, thumb in the direction of the current fingers in the direction of the magnetic field (open) the force is out of the palm of the hand return to top
Answer 2
out of the page
INCORRECT
Try using the third hand rule.
Remember: Left hand for negative charges, thumb in the direction of the current fingers in the direction of the magnetic field (open) the force is out of the palm of the hand
return to top
Answer 3
toward the top of the page
INCORRECT
Try using the third hand rule.
Remember: Left hand for negative charges, thumb in the direction of the current fingers in the direction of the magnetic field (open) the force is out of the palm of the hand return to top
Answer 4
towards the bottom of the page
INCORRECT
Try using the third hand rule.
Remember: Left hand for negative charges, thumb in the direction of the current fingers in the direction of the magnetic field (open) the force is out of the palm of the hand. return to top
What's this question really asking?
Can you apply the third hand rule to this diagram to figure out which direction the force acts on this wire? return to top
