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tbaguy
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Homework Statement
The current in a straight wire is traveling from left to right (in the plane of a page).
Right above the wire is a electron which is moving parallel to the wire and also left to right
The question is which direction is the magnetic force above the wire pointing.
Possible answers from Princeton mcat review are: a) up the plane of the page b) into the page c) out of the page d) down the plan of the page
author 's answer is a. up the plane of the page
I think he is wrong and the answer should be d) down the page
Can someone tell if the author is right and why.
Homework Equations
left hand rule since there is a electron
The Attempt at a Solution
If you curl your left hand around the wire, your thumb should point to the left for the direction of the current. Your finger, which is the magnetic field should be in the page. therefore the magnetic force which is indicated by palm of your left hand should point down the plane of the page