Lesson 8.1 – Magnetic Fields & Magnetic Force (35 Prompts)

Foundation (1–10)

1. Define magnetic field.

2. State unit of magnetic flux density.

3. Draw field around a bar magnet.

4. Identify north and south poles.

5. State Fleming's Left-Hand Rule.

6. Write F = BIL.

7. Define uniform magnetic field.

8. Identify direction of force on current.

9. Give example of magnetic force in daily life.

10. Define magnetic flux.

Intermediate (11–23)

11. Calculate force on a current-carrying wire.

12. Explain significance of angle in F = BIL sinθ.

13. Sketch field around straight conductor.

14. Compare magnetic and electric forces.

15. Determine force direction using Fleming’s rule.

16. Analyze motion of charged particle in magnetic field.

17. Explain circular motion of charges.

18. Calculate radius of charged particle path.

19. Explain magnetic field strength.

20. Solve F = qvB problems.

21. Draw velocity–force–field vector diagram.

22. Compare fields of magnets and electromagnets.

23. Model magnetic deflection in CRT.

Advanced (24–35)

24. Derive magnetic force from Lorentz force law.

25. Solve full vector cross-product problems.

26. Analyze helical motion of charged particles.

27. Discuss cyclotron principle.

28. Calculate cyclotron frequency.

29. Analyze magnetic focusing.

30. Evaluate limits of classical magnetic force model.

31. Solve multi-charge trajectory problems.

32. Model force on non-uniform magnetic field.

33. Apply magnetic force to mass spectrometer design.

34. Compare magnetic force at relativistic speeds (conceptual).

35. Discuss limitations of F = qvB in quantum domain.

Lesson 8.2 – Magnetic Fields of Conductors & Solenoids (35 Prompts)

Foundation (1–10)

1. Draw field around straight conductor.

2. State right-hand grip rule.

3. Identify direction of magnetic field around wire.

4. Define solenoid.

5. Write B = μ₀nI.

6. Identify regions of strong field in solenoid.

7. Define magnetic permeability.

8. Give example of electromagnet use.

9. Describe effect of increasing current.

10. State meaning of turns per unit length.

Intermediate (11–23)

11. Calculate B at distance from wire.

12. Explain uniform field inside solenoid.

13. Compare field of long solenoid and short coil.

14. Calculate B for solenoid.

15. Distinguish μ and μ₀.

16. Analyze effect of core material.

17. Sketch field pattern for solenoid.

18. Explain magnetic domains qualitatively.

19. Compare electromagnets and permanent magnets.

20. Solve problems with multiple wires.

21. Determine field direction using rules.

22. Model solenoid force on magnetic material.

23. Evaluate efficiency of electromagnet.

Advanced (24–35)

24. Derive solenoid field expression.

25. Model toroid field.

26. Solve multi-wire superposition field.

27. Analyze hysteresis loop qualitatively.

28. Evaluate energy in magnetic field.

29. Derive B-field of circular loop (qualitative).

30. Solve magnetic field integral (conceptual).

31. Compare different core materials.

32. Evaluate ideal vs non-ideal solenoid.

33. Model magnetic shielding.

34. Analyze fringe fields in solenoid.

35. Apply solenoid concepts to MRI systems.

Lesson 8.3 – Electromagnetic Induction (35 Prompts)

Foundation (1–10)

1. Define electromagnetic induction.

2. State Faraday’s law.

3. State Lenz’s law.

4. Write ε = −dΦ/dt.

5. Define magnetic flux.

6. Draw simple induction setup.

7. Identify direction of induced current.

8. Give example of induction.

9. State units of flux.

10. Explain meaning of negative sign.

Intermediate (11–23)

11. Calculate induced emf from flux change.

12. Explain relative motion importance.

13. Sketch flux vs time graph.

14. Compare mutual and self-induction.

15. Identify factors affecting emf magnitude.

16. Solve moving rod induction problem.

17. Explain back emf in motors.

18. Analyze eddy currents qualitatively.

19. Sketch induced current direction for magnet-in-coil.

20. Solve induction problem with coil turns.

21. Compare emf from slow vs fast change.

22. Explain induction heating.

23. Model induced emf in rotating coil.

Advanced (24–35)

24. Derive Faraday’s law mathematically.

25. Model flux linkage in transformer.

26. Evaluate back emf quantitatively.

27. Solve complex induction geometry.

28. Analyze eddy current braking.

29. Derive emf in AC generator.

30. Use calculus for non-linear flux change.

31. Compare induction in conductors vs superconductors.

32. Solve induced emf in 2D field.

33. Analyze Maxwell–Faraday equation qualitatively.

34. Evaluate losses in magnetic materials.

35. Apply induction to renewable energy systems.

Lesson 8.4 – Alternating Current & RMS (35 Prompts)

Foundation (1–10)

1. Define alternating current.

2. Define frequency.

3. Write V = V₀ sinωt.

4. Define RMS value.

5. Write Irms = I₀/√2.

6. Sketch AC waveform.

7. Define peak value.

8. Distinguish AC from DC.

9. Identify period from graph.

10. Explain ω = 2πf.

Intermediate (11–23)

11. Calculate RMS value for given peak.

12. Sketch voltage vs time graph.

13. Explain phase difference.

14. Compare in-phase and out-of-phase signals.

15. Determine instantaneous value.

16. Analyze AC voltage in resistor.

17. Solve AC power P = Vrms Irms cosφ.

18. Identify power factor.

19. Explain significance of power factor.

20. Calculate average power.

21. Explain why AC is used for transmission.

22. Sketch phasor diagram.

23. Compare RMS and average values.

Advanced (24–35)

24. Derive RMS mathematically.

25. Model AC circuits with phasors.

26. Solve AC power factor correction problem.

27. Analyze non-sinusoidal AC signals.

28. Compare harmonic components.

29. Solve AC circuits using complex numbers.

30. Model three-phase AC qualitatively.

31. Evaluate AC losses in power lines.

32. Analyze AC behaviour in capacitors/inductors.

33. Solve multi-loop AC circuit.

34. Compare DC vs AC efficiency.

35. Apply AC theory to household wiring.

Lesson 8.5 – Inductive & Capacitive Reactance (35 Prompts)

Foundation (1–10)

1. Define reactance.

2. Define inductive reactance.

3. Define capacitive reactance.

4. Write XL = ωL.

5. Write XC = 1/ωC.

6. Define impedance.

7. Identify inductor in AC.

8. Identify capacitor in AC.

9. Draw impedance triangle.

10. Define resonance.

Intermediate (11–23)

11. Calculate XL.

12. Calculate XC.

13. Compare XL and XC.

14. Plot reactance vs frequency.

15. Solve impedance Z = √(R² + (XL − XC)²).

16. Explain phase relation in RL circuit.

17. Explain phase relation in RC circuit.

18. Analyze resonance in RLC.

19. Solve resonance frequency.

20. Sketch phasor diagrams.

21. Compare voltage drops across R, L, C.

22. Solve multi-component AC circuit.

23. Evaluate effect of frequency change.

Advanced (24–35)

24. Derive impedance expression using complex numbers.

25. Model AC behaviour using calculus.

26. Analyze bandwidth and Q-factor.

27. Compare under/over/critical damping.

28. Solve RLC transient problems qualitatively.

29. Evaluate resonance in AC filters.

30. Model frequency response.

31. Analyze phase shifts mathematically.

32. Solve multi-loop RLC network.

33. Evaluate energy exchange in RLC.

34. Compare real vs ideal components.

35. Apply RLC concepts to communication systems.

Lesson 8.6 – Transformers (35 Prompts)

Foundation (1–10)

1. Define transformer.

2. Define primary coil.

3. Define secondary coil.

4. State Vs/Vp = Ns/Np.

5. Identify step-up transformer.

6. Identify step-down transformer.

7. Give example of transformer use.

8. Define core.

9. State energy loss sources.

10. Draw transformer symbol.

Intermediate (11–23)

11. Calculate secondary voltage.

12. Compare ideal and real transformer.

13. Explain role of soft iron core.

14. Analyze eddy current losses.

15. Sketch transformer diagram.

16. Calculate current in secondary.

17. Derive transformer equation conceptually.

18. Explain flux linkage.

19. Solve transformer with load.

20. Evaluate transformer efficiency.

21. Explain laminated core.

22. Analyze voltage regulation.

23. Compare power in primary and secondary.

Advanced (24–35)

24. Derive transformer emf equations.

25. Model leakage flux.

26. Analyze transformer under load changes.

27. Solve multi-winding transformer problems.

28. Evaluate harmonics in transformers.

29. Model transformer heating.

30. Solve transformer equivalent circuit (qualitative).