pulse shaped wave

square wave

sine wave

triangular wave

an a. c.

a pulsating current

an oscillating current

a d. c.

lagging

leading

maximum

zero

smaller in diameter and larger in axial length

larger in diameter and smaller in axial length

larger in diameter and axial length

smaller in diameter and axial length

20 Hz

40 Hz

60 Hz

80 Hz

N=(120 x Frequency)/Number of Poles 600=(120 x Frequency)/8 Frequency = (600 x 8) / 120 Frequency = 40 Hz