MN is a current carrying conductor in the plane of the paper as shown in the figure below.
(i) Find the directions of the magnetic fields produced by it at points A and B?
(ii) Where will the strength of the magnetic field be larger? Give reasons.
(iii) If the polarity of the battery connected to the wire is reversed, draw the magnetic field lines around MN
(iv) State the rule that is used to find the direction of the magnetic field for a straight current carrying conductor.
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