A rectangular coil of wire can rotate in a magn... - WAEC Physics 1990 Question
A rectangular coil of wire can rotate in a magnetic field. The ends of the coil are soldered to the two halves of a split ring. Two carbon brushes are made to press lightly against the split ring and when these are connected in circuit with a battery and rheostat, the coil rotates. This is a description of
A
a suspended- coil vanometer
B
a moving-cell ammeter
C
a d.c generator
D
an electric motor
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Correct Option: C
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