You are given a compass. See figure below. Where would you place a bar magnet wi

Question

You are given a compass. See figure below. Where would you place a bar magnet with an orientation perpendicular to compass needle) in order to make the north (red) nd of the needle deflect to the left (four possible answers)? Show with a diagram. You hould be sure and label N & S ends of magnet. Assume you have a straight wire that is located directly above (and is parallel to) the ompass needle in question 3 above. Using right hand rule for current (see figure below r help. I is current direction) what direction would the needle deflect if a positive urrent ran from south to north? Explain your answer. Please note that "north” B- eld comes out of your fingertips.

Explanation / Answer

If we assume a straight wire which is located directly above (and parallel to) the compass needle in question 3 as given, The right hand rule shows the direction of the circular magnetics field direction with respect to the current flow direction...

Right hand thumb rule states that if current goes to a particular direction through a wire, there would be a magnetic field produced and circulate the wire towards the curl' direction of right hand if the hand is placed on the wire showing the direction of current along the extended thumb finger as shown in second fig given in the question...


There fore the imaginary force lines will show the direction of applied force direction on the niddle if the wire is placed on the niddle...The circulating arrow then directs the motion of niddle towards left...

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