At a given point on the cardboard the magnetic field produced by the current flowing to the coil is directly proportional to the which and which forming the coil
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Correct option is
C and D
option (c) Current flowing through the conductor
option (d) Distance from the conductor
Explaination:
The magnetic field at a point P due to a infinite (very long) straight wire carrying a current I is proportional to I, and is inversely proportional to the perpendicular distance R of the point from the wire.
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