Electric Generator
Explore how rotating a coil in a magnetic field produces alternating emf.
ε = NBAω sin(ωt)
Experiment controls 12
ε = NBAω sin(ωt)
Simulation power / activity
Observation: Adjust a variable and examine the model response.
Experimental workbench ● ACTIVE
LIVE MODEL VALUE—Calculated response
CONTROL SUMMARY—Current settings
LIVE RESPONSE PROFILEModel view
Live analysis 03
Governing relationship
ε = NBAω sin(ωt)
ε = NBAω sin(ωt)
Guided procedure
- Identify the apparatus and the variables.
- Start with the default settings and note the readings.
- Change one variable at a time.
- Record observations and compare the trend.
- Explain the result using the governing relationship.
Challenge
What happens to the peak emf when rotation speed increases?
Observation notebook 0 readings recorded
| Trial | Settings | Model response |
|---|---|---|
| No observations recorded yet. | ||
Guided experiment · progress tracker
0 / 5 completed
Change one variable at a time. Compare readings while keeping other conditions constant.
Practical method · drag or tap matching
Control variable
Kept unchanged for a fair comparison
Measured quantity
Value read from an instrument or model
Observation record
A written record of what happened
0 / 3 matched
Knowledge check
Why should only one independent variable be changed at a time?
Choose an answer.
Practical notebook · export notes
Physics V4 · Electric Generator — Investigation & Assessment Studio
Electromagnetic induction · Experiment-specific investigation, evidence log, graph analysis and teacher review.
1 · Investigation mission
Objective: Investigate how generator rotation produces an induced output.
Prediction question
If a generator coil rotates faster in the same magnetic field, induced emf generally…
If a generator coil rotates faster in the same magnetic field, induced emf generally…
Choose an answer and submit your prediction.
Scientific principle
A generator converts mechanical energy into electrical energy through electromagnetic induction.
A generator converts mechanical energy into electrical energy through electromagnetic induction.
2 · Fault-finding challenge
A student performs this experiment but obtains an unexpected result. Identify the most likely issue.
The coil is not rotating relative to the magnetic field, so flux is not changing.
Diagnose the experimental setup.
3 · Observation notebook & graph
Use the original simulation controls to perform a trial, then enter the observed values. This table records student-entered observations; it does not claim to read every legacy simulation's internal sensors.
Record at least two observations to analyse the trend.
| Trial | Rotation speed (relative) | Induced output (relative) |
|---|
4 · Practical reflection & report
Your report includes the objective, entered observations, analysis and reflection.
5 · Teacher assessment rubric
Conceptual prediction0 / 20
Fault diagnosis0 / 20
Observation quality (2+ readings)0 / 20
Graph / trend analysis0 / 20
Inference and conclusion0 / 20
Assessment score: 0 / 100
6 · Guided experimental procedure
Follow the sequence below and use the original experiment controls above to change one variable at a time.
- Read the objective and identify the independent and dependent variables.
- Inspect the apparatus and reset the simulation to its initial state.
- Change only the independent variable while keeping other conditions controlled.
- Record at least three observations in the notebook.
- Plot the dependent variable against the independent variable and describe the trend.
- Answer the prediction and fault-finding questions, then write an evidence-based conclusion.
Experimental discipline
Use consistent units, avoid changing multiple variables at once, and distinguish measured observations from theoretical predictions.
Use consistent units, avoid changing multiple variables at once, and distinguish measured observations from theoretical predictions.