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SS3: PHYSICS - 2ND TERM
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Magnetic Field10 Topics|1 Quiz
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Magnetic Field
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Magnetic & Non-Magnetic Substances
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Soft & Hard Magnetic Substances
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Temporary & Permanent Magnet
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Methods of Making Magnets
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Demagnetization
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Magnetic Properties of Iron & Steel
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Neutral Point | Magnetic Flux Density | Magnetic Potential
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Characteristics of Lines of Force
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Magnetic Screening
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Magnetic Field
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Magnetic Field5 Topics|1 Quiz
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Electromagnetic Field4 Topics|1 Quiz
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Electromagnetic Induction7 Topics|1 Quiz
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The Transformer5 Topics|1 Quiz
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Simple A.C Circuit11 Topics|1 Quiz
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Models of the Atom2 Topics|1 Quiz
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Radioactivity3 Topics|1 Quiz
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Half Life8 Topics|1 Quiz
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Energy Quantization5 Topics|1 Quiz
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Photoelectric Effect6 Topics|1 Quiz
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Wave Particle Paradox6 Topics|1 Quiz
Lesson 2,
Topic 2
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The Working Principle of an Electric Bell and a Telephone Earpiece
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Topic Content:
- Electric Bell
- Working Principle
- Telephone Earpiece
Electric Bell:

This consists of a U-shaped magnet with a coil of wire wound in the opposite direction
Working Principle:
When the bell is pressed, current flows through the coil of electromagnets and the soft iron armature is attracted by the electromagnet and the hammer attached to the armature moves such that
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