501 prompts matching "Finding an unknown force on a balanced beam"
Practice set: Induced e.m.f. problems for moving conductors
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WAEC prep: Transformer energy losses and how they are reduced
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Exam timing: A timed induction problem set
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Teach me: Ferromagnetic, paramagnetic and diamagnetic materials
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Let me explain: The hysteresis loop and what its area represents
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WAEC prep: Soft and hard magnetic materials and their uses
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Spot my mistake: Choosing a hard magnetic material for a transformer core
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Real-life Nigeria: Magnets in loudspeakers and electric generators
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Physics at work: Electrical machine manufacture
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Teach me: Conduction of electricity through a liquid
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Quiz: Conduction through a gas at reduced pressure
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Let me explain: The discharge tube and the effect of pressure
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Practice set: Problems on conduction in electrolytes
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WAEC prep: The cathode ray and its properties
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Spot my mistake: Confusing electron flow with conventional current
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Exam timing: A timed conduction problem set
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Quiz: Total internal reflection as the basis of the fibre
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Let me explain: The structure of a fibre: core, cladding and coating
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Worked example: The critical angle from stated refractive indices
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WAEC prep: The advantages of fibre over copper cable
Act as a WAEC Physics examiner. I am in SS 3. Set me five exam-style questions on the adva