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Generator (right)
Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induced Current. Lenz: the induced current fights the change. A.c. generator uses slip rings; d.c. dynamo uses a commutator.
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Generator (right)
What is it?
Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induced Current. Lenz: the induced current fights the change. A.c. generator uses slip rings; d.c. dynamo uses a commutator.
In simple words
Generator (right) is a core idea in this chapter. Learn the meaning first, then the main parts, then one clear example.
Examples
- Bicycle dynamo (named)
- Moving a magnet into a coil
- Transformers need changing flux, not a spinning hand on d.c.
GENERATOR (RIGHT)
Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induced Current. Lenz: the induced current fights the change. A.c. generator uses slip rings; d.c. dynamo uses a commutator.
Recommended for Class 10
Full school-level explanation
Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induced Current. Lenz: the induced current fights the change. A.c. generator uses slip rings; d.c. dynamo uses a commutator.
Two hands, two jobs:
GENERATOR (RIGHT)
Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induced Current. Lenz: the induced current fights the change. A.c. generator uses slip rings; d.c. dynamo uses a commutator.
Remember
- Lenz fights the change
- slip rings vs commutator
Examples
- Bicycle dynamo (named)
- Moving a magnet into a coil
- Transformers need changing flux, not a spinning hand on d.c.
Remember
- Lenz fights the change
- slip rings vs commutator
- grip for the wire field
- left = motor
- Lenz fights the change
- slip rings vs commutator
How the ideas connect
A long straight wire: field circles. A solenoid: field like a bar magnet, with a N and S. Increasing turns or current strengthens it. A core of iron concentrates the field (electromagnet, already in Class 9).
Deeper understanding
Go beyond memorising Generator (right). Connect the definition to reasons, relationships, exceptions, and exam wording.
How the ideas connect
A long straight wire: field circles. A solenoid: field like a bar magnet, with a N and S. Increasing turns or current strengthens it. A core of iron concentrates the field (electromagnet, already in Class 9).
Exam focus
Quick revision
- Lenz fights the change
- slip rings vs commutator
- grip for the wire field
- left = motor
- GENERATOR (RIGHT): Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induce
- Exam tip: Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL
Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL is quoted.
For long answers on Generator (right): define clearly → explain the main parts → give one example → state one exam caution.
Exam Focus
Exam Focus
Important points
- Lenz fights the change
- slip rings vs commutator
- grip for the wire field
- left = motor
Important formulas
- Lenz fights the change
- slip rings vs commutator
- grip for the wire field
Common exam traps
- Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL is quoted.
- Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL is quoted.
Long question structure
Definition → key parts → example → exam caution
Common Mistakes
Common Mistakes
- Mistake
Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL is quoted.
- Mistake
Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL is quoted.
- Mistake
Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL is quoted.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
Lenz fights the change
slip rings vs commutator
grip for the wire field
left = motor
Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induced Current. Lenz: the induced current fights the change. A.c.
left = motor
- Definition
- Move a conductor across a field and an emf appears (Faraday). Right-hand rule: Motion, Field, induced Current. Lenz: the induced current fights the change. A.c.
- Formula
- left = motor
- Example
- Bicycle dynamo (named)
- Critical warning
- Left-hand motor, right-hand dynamo. Writing the wrong hand loses the direction mark even if F = BIL is quoted.
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Exam Practice
Define
Q1. Define Generator (right).
Explain
Q2. Explain: GENERATOR (RIGHT).
Example
Q3. Give one clear example of Generator (right) and say why it fits.
Mistake
Q4. State one common mistake students make about Generator (right).
Exam note
Q5. Write a short exam note on Generator (right): definition, two points, one example.
Sources & References
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.