Electrical Machines – Generators and Motors (Grade 12 NSC Matric Physical Sciences): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
When is maximum current induced in a conductor moving through a magnetic field?
When is maximum current induced in a conductor moving through a magnetic field?
When perpendicular to magnetic field lines
What does Faraday's Law state about induced EMF?
What does Faraday's Law state about induced EMF?
EMF is proportional to rate of flux change
What energy conversion occurs in a generator?
What energy conversion occurs in a generator?
Mechanical energy to electrical energy
Which component is used in AC generators to maintain electrical contact?
Which component is used in AC generators to maintain electrical contact?
Slip rings
What pattern does the current from an AC generator follow?
What pattern does the current from an AC generator follow?
Sinusoidal wave alternating pattern
What does an electric motor convert?
What does an electric motor convert?
Electrical energy to mechanical energy
What is the formula for the magnetic component of the Lorentz force?
What is the formula for the magnetic component of the Lorentz force?
In the right-hand rule for motors, what does the thumb indicate?
In the right-hand rule for motors, what does the thumb indicate?
Direction of magnetic force
What is the function of a car alternator?
What is the function of a car alternator?
Generates AC to charge battery
Why are transformers used in electricity transmission from power stations?
Why are transformers used in electricity transmission from power stations?
Convert to high voltage for efficiency