(i) How will the magnetic field around a current carrying straight conductor be affected on : (a) increasing the current through the conductor ? (b) changing the direction of flow of current in the conductor ? (ii) Describe an activity with diagram to draw magnetic field lines due to a current carrying circular loop.
(iii) State the rule used to find the direction of magnetic field due to a current carrying circular loop.
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(iii) Right hand thumb rule or screw rule
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