250 prompts matching "What the moment of a force is"
Exam prep: The earth's magnetic field and the compass
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Quiz: Magnetic field lines and their properties
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Worked example: The neutral point, and where it occurs
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Practice set: The field around a straight current-carrying wire
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Exam prep: The field around a solenoid and the right-hand grip rule
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Spot my mistake: Magnetic flux and magnetic flux density
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Quiz: Optical instruments and the electromagnetic spectrum reviewed
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Practice set: The gravitational field reviewed
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Real-life Nigeria: Linking waves, sound and light together
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Real-life Nigeria: Measuring the current in a Nigerian household circuit
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Worked example: Calculating the work done in moving a charge
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Spot my mistake: Primary cells and secondary cells compared
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Practice set: The ohmic conductor and the non-ohmic conductor
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Quiz: The fuse and how it protects a circuit
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Worked example: Choosing the right fuse rating for an appliance
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Practice set: The circuit breaker and how it works
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Exam prep: The a.c. generator and how it works
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Practice set: The electric bell and how it operates
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Exam prep: The relay and the telephone earpiece
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Exam prep: The simple d.c. motor and how it turns
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