501 prompts matching "What electric charge is, and the two kinds of it"
Quiz: Ohm's law and ohmic against non-ohmic conductors
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Practice set: Power and energy problems across appliances
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Spot my mistake: An energy bill calculation left in watt-seconds
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Exam timing: A timed energy and power problem set
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Worked example: Turns ratio and output voltage of a transformer
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Real-life Nigeria: Step-down transformers on Nigerian distribution poles
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Worked example: Choosing a core material from hysteresis data
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Spot my mistake: Choosing a hard magnetic material for a transformer core
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Spot my mistake: Confusing electron flow with conventional current
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Real-life Nigeria: Neon signs and fluorescent tubes
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Practice set: Problems on signal loss and fibre geometry
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WAEC prep: The advantages of fibre over copper cable
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Practice set: Problems on laser output and photon count
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Spot my mistake: Treating laser light as simply very bright light
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Real-life Nigeria: Lasers in surgery, printing and barcode scanning
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Quiz: Deriving the dimensions of a compound quantity
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Spot my mistake: A dimensional check that overlooks a dimensionless constant
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Let me explain: Why a rocket works in the vacuum of space
I have just studied why a rocket works in the vacuum of space in my SS3 Physics class. Let
Worked example: Thrust from a stated exhaust speed and mass flow rate
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Real-life Nigeria: Nigeria's satellite launches and space agency work
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