250 prompts matching "Alternating current and how it differs from direct current"
Worked example: Coulomb's law and the force between two charges
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Practice set: Conductors, insulators and semiconductors
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Spot my mistake: Lightning and the lightning conductor
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Practice set: Internal resistance and the lost volts
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Spot my mistake: Primary cells and secondary cells compared
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Real-life Nigeria: The maintenance and charging of a car battery
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Practice set: The ohmic conductor and the non-ohmic conductor
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Exam prep: Measuring resistance with a metre bridge or a potentiometer
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Physics at work: Circuit design work in Nigeria
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Spot my mistake: The d.c. generator and the commutator
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Teach me: The magnetic field produced by an electric current
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Quiz: Resistance and Ohm's law reviewed
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Worked example: Electrical safety and the cost of energy reviewed
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Exam prep: The magnetic effect of an electric current reviewed
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Teach me: The force on a conductor carrying current in a magnetic field
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Quiz: Fleming's left-hand rule
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Worked example: Calculating the force on a current-carrying conductor
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Real-life Nigeria: Electric motors in Nigerian homes and industry
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Worked example: Calculating output voltage from the turns ratio
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Physics at work: Why electricity is transmitted at high voltage
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