Ideal commutation can be shown graphically by _____________(a) Straight line passing through origin(b) Straight line not passing through origin but with +ve slope(c) Straight line not passing through origin but with -ve slope(d) Curve increasing towards +ve t axisThis question was posed to me in class test.Asked question is from Commutation Process in chapter Commutation Process & Excitation Methods of DC Machines

Ideal commutation can be shown graphically by _____________(a) Straigh

1.	Ideal commutation can be shown graphically by _____________(a) Straight line passing through origin(b) Straight line not passing through origin but with +ve slope(c) Straight line not passing through origin but with -ve slope(d) Curve increasing towards +ve t axisThis question was posed to me in class test.Asked question is from Commutation Process in chapter Commutation Process & Excitation Methods of DC Machines
Answer» Correct choice is (c) Straight LINE not PASSING through origin but with -ve slope The EXPLANATION is: Ideal Commutation (also called straight-line commutation) is that in which the current of the commutating COILS CHANGES linearly from + Ic to – Ic in the commutation period. Thus, it will form a straight line with -ve slope.

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