229 prompts matching "Exam prep: Converting between units and using standard form"
Quiz: Potential difference, and how it differs from e.m.f.
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Let me explain: The voltmeter and how it is connected
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Worked example: Calculating the work done in moving a charge
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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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Quiz: Ohm's law and how it is stated
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Let me explain: Resistivity and the factors affecting resistance
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Practice set: The ohmic conductor and the non-ohmic conductor
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Real-life Nigeria: Resistors and rheostats in practical circuits
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Worked example: Calculating the effective resistance of resistors in series
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Worked example: Calculating the effective resistance of resistors in parallel
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Quiz: The fuse and how it protects a circuit
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Let me explain: Earthing, and why an appliance is earthed
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Worked example: Choosing the right fuse rating for an appliance
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Practice set: The circuit breaker and how it works
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Spot my mistake: Overloading a socket, and what follows from it
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Let me explain: Lenz's law and the direction of an induced current
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Worked example: Calculating an induced electromotive force
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Spot my mistake: The d.c. generator and the commutator
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