If a negatively charged particle moves in the positive R direction through a reg

Question

If a negatively charged particle moves in the positive R direction through a region with magnetic field in the -9 direction, which way will the force on the particle initially be? a. + 1. b. -A e. +2 2. Two wires are on a student's flat desk running parallel to each other. If the wire on the left has the current running away from the student, and the one on the right is towards the student, which of the following is always true about the total magnetic field in reference to the desk? a. Left of wires is in b. Left of wires B is out c. Left of wires B is zero d. e. f. Right of wires B is in Right of wires B is out Right of wires B is zero g. Between wires B is in h. Between wires B is out i. Between wires is zero

Explanation / Answer

For negatively charged particle,use Flemings right hand thumb rule to find Force acting

then

according to that rule

stretch right hand thumb,Forefinger and middle finger perpendicular to each other

then Fore finger is in the direction of magnetic field

middle finger is in the direction of velocity of electron

and thumb gives the direction of Force

then

answer is e) + z hat

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