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Generators
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Generators
Recommended for Class 10
Generators
An electric generator converts mechanical energy into electrical energy using electromagnetic induction.
Basic Principle
A coil is rotated in a magnetic field.
As the coil turns, the magnetic flux through the coil changes.
This produces an induced e.m.f.
A.C. Generator
A simple alternating-current generator uses:
rotating coil; magnetic field; slip rings; carbon brushes.
The induced voltage reverses direction every half-turn, producing alternating output.
Energy Conversion
Mechanical energy → electrical energy.
The mechanical input may come from:
steam turbine; wind turbine; hydro turbine; engine.
Factors Affecting Output
Generated e.m.f. increases with:
stronger field; more turns; larger coil area; faster rotation.
Generators — Advanced
Common Mistakes
Common Mistakes
- Mistake
A generator does not create energy.
- Mistake
It converts mechanical energy into electrical energy.
Revision Zone
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- Definition
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Practice
PQ
Q1. Define generator
PQ
Q2. principle
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Q3. identify slip rings
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Q4. energy conversion
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Q5. factors increasing emf.
Exam Practice
EQ
Q1. Explain generator operation.
EQ
Q2. State energy conversion.
EQ
Q3. Describe slip-ring role.
EQ
Q4. State four factors affecting emf.
EQ
Q5. Explain why output alternates.
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.