250 prompts matching "An echo calculation that forgets the return journey"
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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Spot my mistake: Connecting an ammeter in parallel by mistake
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Teach me: What electromotive force means
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Quiz: Potential difference, and how it differs from e.m.f.
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Worked example: Calculating the work done in moving a charge
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Exam prep: Cells connected in series and in parallel
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Spot my mistake: Primary cells and secondary cells compared
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Teach me: What resistance is, and what it depends on
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Quiz: Ohm's law and how it is stated
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Worked example: Calculating resistance from voltage and current
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Exam prep: Measuring resistance with a metre bridge or a potentiometer
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Spot my mistake: Adding resistances wrongly in a series problem
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Exam prep: Combining series and parallel sections in one circuit
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Spot my mistake: Overloading a socket, and what follows from it
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Worked example: Calculating an induced electromotive force
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Quiz: Oersted's experiment and what it showed
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Teach me: Electric charge, current and electromotive force reviewed
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Quiz: Resistance and Ohm's law reviewed
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