250 prompts matching "Step-down transformers on Nigerian distribution poles"
Quiz: Resistance and Ohm's law reviewed
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Let me explain: Series and parallel circuits reviewed
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Worked example: Electrical safety and the cost of energy reviewed
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Exam prep: The magnetic effect of an electric current reviewed
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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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Exam prep: The simple d.c. motor and how it turns
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Worked example: Calculating output voltage from the turns ratio
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Quiz: The Rutherford scattering experiment and what it showed
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Let me explain: Atomic number, mass number and isotopes
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Exam prep: The cloud chamber and the photographic plate as detectors
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Quiz: The decay curve, and reading a half-life from it
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Let me explain: The random nature of radioactive decay
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Worked example: Calculating the mass remaining after a number of half-lives
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Spot my mistake: Assuming a sample decays completely after two half-lives
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Quiz: The earth's atmosphere and the layers within it
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Let me explain: The earth's magnetic field and what causes it
I have just studied the earth's magnetic field and what causes it in my SS2 Physics class.
Quiz: The planets and the order in which they orbit
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Worked example: Calculating the orbital period of a planet
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Exam prep: The origin of the solar system and the theories about it
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