A small model motor has a fixed magnetic field of and its coil can safely carry a…
PHYSICS · Single correct · CBSE · Physics · Moving Charges and Magnetism · Moving Charges and Magnetism
Problem
A small model motor has a fixed magnetic field of 0.30T and its coil can safely carry a maximum current of 6A. If a student wants to increase the turning force produced by one side of the coil, which single modification would be most effective?
(a) Place the wire parallel to the magnetic field
(b) Increase the number of turns of wire in the coil while keeping the same loop area
(c) Increase the length of wire that lies inside the magnetic field
(d) Reverse the direction of current every half–turn