Podcast
Questions and Answers
What principle do generators use to convert mechanical motion to electrical energy?
What principle do generators use to convert mechanical motion to electrical energy?
- Mechanical friction
- Nuclear fission
- Electric resistance
- Electromagnetic induction (correct)
Which rule should be used to determine the direction of induced emf in a coil?
Which rule should be used to determine the direction of induced emf in a coil?
- Lenz's law (correct)
- Ohm's law
- Boyle's law
- Newton's third law
Why is no emf induced in a rotating coil when it passes through the neutral plane?
Why is no emf induced in a rotating coil when it passes through the neutral plane?
- Due to lack of magnetic field (correct)
- Due to presence of insulating material
- Due to high resistance
- Due to equal positive and negative charges
What component of a generator causes it to produce DC voltage instead of AC voltage?
What component of a generator causes it to produce DC voltage instead of AC voltage?
When should brush contact change from one commutator segment to the next?
When should brush contact change from one commutator segment to the next?
What is the purpose of the slip rings in a generator?
What is the purpose of the slip rings in a generator?
How many commutator segments are typically required in a two-coil generator?
How many commutator segments are typically required in a two-coil generator?
What causes sparking between the brushes and the commutator in a generator?
What causes sparking between the brushes and the commutator in a generator?
What is the principle by which generators convert mechanical motion to electrical energy?
What is the principle by which generators convert mechanical motion to electrical energy?
Why should brush contact change from one commutator segment to the next in a generator?
Why should brush contact change from one commutator segment to the next in a generator?
How can the field strength be varied in a practical DC generator?
How can the field strength be varied in a practical DC generator?
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