Indiana Science HS-PSII-7.3
The Standard
Apply Ohm’s Law, Faraday’s Law, and Lenz’s Law to determine the amount and direction of current induced by a changing magnetic flux in a loop of wire or simple loop circuit.
Indiana Academic Standards for Science (2023) · Electromagnetic Induction
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students track how magnetic flux through a wire loop changes. They calculate the induced current from that change and the loop’s resistance, then decide which way the current flows.
What Mastery Looks Like
- Students calculate induced voltage from the number of turns, flux change, and time. They divide by resistance to find current and draw a direction that produces a magnetic field opposing the change in flux.
Common Misconceptions
- A magnet held still near a loop does not produce a steady induced current. Students may choose a current that opposes the magnetic field itself, rather than the change in flux. Some multiply voltage by resistance instead of dividing.
How to Assess It
- Give this exit ticket: A 10-turn coil’s flux into the page drops from 0.012 Wb to 0.004 Wb per turn in 0.20 s. If resistance is 2 Ω, find the induced current and draw its direction on the page.
Lesson moves
Ways to Teach It
Connect a wire coil to a galvanometer, move a bar magnet in and out, and record how the needle direction changes.
Sketch a loop with increasing flux into the page, then write why its induced current runs counterclockwise.
Give pairs cards with starting and ending flux per turn, time, resistance, and field direction; have them calculate current and draw arrows.
Connect a bicycle dynamo to a 1 kΩ resistor and AC voltmeter; turn its wheel at two speeds and calculate current from each voltage.
Free download
Printable HS-PSII-7.3 Worksheet
A ready-to-print activity worksheet aligned to HS-PSII-7.3, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
Download the worksheetKeep exploring
Related Standards
- HS-PSII-5.2
Develop graphical and mathematical representations that describe the relationship between the between the amount of current passing through an ohmic device and ...
- HS-PSII-7.1
Given the magnitude and direction of a uniform magnetic field, calculate the flux through a specified area in terms of the field magnitude and the size and orie...
- HS-PSII-7.2
Develop graphical and mathematical representations that describe the relationship between the rate of change of magnetic flux and the amount of voltage induced ...
- HS-PSII-6.2
Develop and apply a mathematical representation that describes the relationship between the magnetic field created by a long straight wire carrying an electric ...
Turn this exact standard into a lesson
Grade, subject, topic, and the complete standard are prefilled. Create one free, no account needed.
Also for this standard:Make a WorksheetMake a QuizMake a Sub Lesson