250 prompts matching "The photoelectric effect and what is observed"
Let me explain: Plotting the field around a bar magnet
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Practice set: The field around a straight current-carrying wire
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Practice set: The gravitational field reviewed
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Quiz: Charging by friction, by contact and by induction
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Practice set: Conductors, insulators and semiconductors
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Quiz: Conventional current and electron flow
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Worked example: Calculating charge from current and time
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Exam prep: Current in a metallic conductor and in an electrolyte
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Quiz: Potential difference, and how it differs from e.m.f.
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Exam prep: Cells connected in series and in parallel
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Exam prep: Combining series and parallel sections in one circuit
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Practice set: The factors affecting the size of an induced e.m.f.
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Quiz: Fleming's left-hand rule
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Let me explain: The factors that determine the size of the force
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Practice set: The force between two parallel current-carrying conductors
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Real-life Nigeria: Electric motors in Nigerian homes and industry
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Practice set: The efficiency of a transformer
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Spot my mistake: Assuming a transformer can work on direct current
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Real-life Nigeria: Transformers in Nigeria's power transmission network
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Exam prep: The models of the atom compared, from Thomson to Bohr
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