DC Generators: Producing DC Voltage (VCE SSCE Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What energy conversion does a DC generator perform?
What energy conversion does a DC generator perform?
Kinetic energy to electrical energy
What is the key function of the split ring commutator in a DC generator?
What is the key function of the split ring commutator in a DC generator?
Reverses connections every half cycle
When is the induced EMF in a rotating coil at maximum?
When is the induced EMF in a rotating coil at maximum?
When coil is parallel to the field
In the formula , what does represent?
In the formula , what does represent?
Angle between field and normal to coil
According to Faraday's law, induced EMF is proportional to what?
According to Faraday's law, induced EMF is proportional to what?
Rate of change of magnetic flux
What is the phase relationship between flux and EMF in a rotating coil?
What is the phase relationship between flux and EMF in a rotating coil?
90° out of phase
What is the function of carbon brushes in a DC generator?
What is the function of carbon brushes in a DC generator?
Provide electrical connection to circuit
Why do practical DC generators use multiple coils at different angles?
Why do practical DC generators use multiple coils at different angles?
To produce smoother DC output
Why do practical DC generators use electromagnets instead of permanent magnets?
Why do practical DC generators use electromagnets instead of permanent magnets?
Stronger fields and voltage control
When is magnetic flux through a rotating coil at maximum?
When is magnetic flux through a rotating coil at maximum?
When coil is perpendicular to field