Electromagnetic Induction And Alternating Current — Concept Maps
Tamil Nadu Board · Class 12 · Physics
3 concept maps of Electromagnetic Induction And Alternating Current for Tamil Nadu Board Class 12 Physics, each also written out as a text outline.
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This flowchart shows how magnetic flux is calculated from field strength, area, and angle, with specific cases illustrated.
The map in words
- Magnetic Field B
- Area A
- ΦB = BA cos θ
- Flux Value
- θ = 0°: Maximum: ΦB = BA
- θ = 90°: Zero: ΦB = 0
- 0° < θ < 90°: Intermediate: ΦB = BA cos θ
- Flux Value
- ΦB = BA cos θ
- Area A
- Angle θ
- cos θ Factor
This sequence diagram shows the progression of Faraday's first experiment, illustrating when current is induced and when it isn't.
The map in words
- M → C: Approaches coil Flux increases
- C → G: Induced current flows
- G → G: Deflection observed
- M → C: Magnet stationary Flux constant
- C → G: No current
- G → G: No deflection
- M → C: Moves away Flux decreases
- C → G: Induced current opposite direction
- G → G: Deflection reversed
Flowchart showing how changing flux leads to induced emf and current through Faraday's law.
The map in words
- Magnetic Flux Changes
- dΦB/dt
- Induced EMF: ε = -N dΦB/dt
- Result
- Rapid change: Large EMF
- Slow change: Small EMF
- Induced Current: i = ε/R
- Current flows in circuit
- Result
- Induced EMF: ε = -N dΦB/dt
- dΦB/dt
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