449 prompts matching "What radioactivity is, and why some nuclei are unstable"
Worked example: The mass deposited from a stated current and time
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WAEC prep: Electroplating and the purification of copper
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Spot my mistake: A Faraday calculation with the wrong valency
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Quiz: Lenz's law and the direction of induced current
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Worked example: Turns ratio and output voltage of a transformer
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Spot my mistake: A transformer calculation with the ratio inverted
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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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WAEC prep: Soft and hard magnetic materials and their uses
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Spot my mistake: Choosing a hard magnetic material for a transformer core
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Real-life Nigeria: Magnets in loudspeakers and electric generators
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WAEC prep: The cathode ray and its properties
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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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Spot my mistake: Assuming light bends round the fibre rather than reflecting
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Practice set: Problems on laser output and photon count
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WAEC prep: The uses and hazards of lasers
Act as a WAEC Physics examiner. I am in SS 3. Set me five exam-style questions on the uses
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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