Physics
JAMB 1984
The electromotive force obtained from a simple dynamo may be increased by
-
A.
increasing the cross-sectional area of the coil
-
B.
winding the coil on a soft-iron armature so as to decrease the magnetic flux through the coil
-
C.
increasing the speed of rotation
-
D.
making the field magnet longer
-
E.
using low-resistance copper coils
Correct Answer: Option C
Explanation
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