Question text
34 Students are asked to suggest factors that affect the speed of rotation of a direct current (d.c.) motor. Three of their suggestions are listed. 1 the strength of the magnetic field 2 the current 3 the number of turns on the coil Which suggestions are correct? A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only
34 Students are asked to suggest factors that affect the speed of rotation of a direct current (d.c.)
motor.
Three of their suggestions are listed.
1 the strength of the magnetic field
2 the current
3 the number of turns on the coil
Which suggestions are correct?
A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only
Select your answer: