250 prompts matching "The magnetic field in an electric bell and a relay"
Quiz: Potential difference, and how it differs from e.m.f.
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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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Exam prep: Measuring resistance with a metre bridge or a potentiometer
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Spot my mistake: The effect of temperature on resistance
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Spot my mistake: Adding resistances wrongly in a series problem
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Spot my mistake: Inverting the reciprocal wrongly in a parallel calculation
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Quiz: Oersted's experiment and what it showed
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Quiz: Resistance and Ohm's law reviewed
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Spot my mistake: The errors most often made in second-term SS2 Physics
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Practice set: The force between two parallel current-carrying conductors
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Teach me: What a transformer does, and why it is needed
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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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Teach me: What radioactivity is, and why some nuclei are unstable
You are my personal SS2 Physics tutor. Teach me what radioactivity is, and why some nuclei
Practice set: Moons, asteroids and comets
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Teach me: What a star is, and how it produces its energy
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Quiz: Nuclear fusion in the core of a star
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Spot my mistake: White dwarfs, neutron stars and black holes
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