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Q1 – What is the main composition of the brushes of a DC motor?
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Q2 – State the functions of motors and generators in terms of energy conversion.
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Q3 – Give TWO reasons why mica is used as the insulation between the segments
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Q4 – Draw a sketch of a brush holder assembly.
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Q5 – What is the function of the brushes in a DC motor?
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Q6 – Compare the starting torque of shunt and series motors
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Q7 – What do you understand by the term separately excited motor?
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Q8 – Name the THREE types of motors classified under self-excited motors.
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Q9 – Draw a circuit diagram for a shunt DC motor.
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Q10 – What are the TWO main characteristics of a series motor?
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Q11 – Name a disadvantage of a separately excited generator.
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Q12 – Name the THREE types of generators classified under self-excited motors.
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Q13 – Name THREE factors necessary to generate electricity.
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Q14 – Name TWO ways in which sparking can be reduced between the brushes and the commutator.
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Q15 – What is the main disadvantage of a series generator?
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