Induction Lab — Peirastes

Lecture 1 — Faraday & Lenz

Lecture 2 — Motional EMF & Generator

Beyond Lecture (§29.4–6)

Coil

Turns N 50

Radius r 0.080 m

Resistance 2.50 Ω

B(t) Schedule

B peak 0.60 T

Ramp dur 0.20 s

Hold dur 0.30 s

Magnet

Mass m 5 g

Tube Damping

k (B²·σ·…) 0.050 N·s/m

Show eddy current swirls

Circuit Elements

EMF ε 24.0 V

Resistance R 8.0 Ω

Inductance L 4.0 H

Geometry & Field

Rail sep L 0.40 m

Field B 0.80 T

Resistance 2.0 Ω

Rod & Drive

Velocity v 5.0 m/s

Mass m 0.10 kg

Coil

Turns N 100

Area A 0.020 m²

Field & Drive

Field B 0.50 T

Speed ω 4.99 rad/s

Show Φ trace (cyan)

Show ε trace (amber)

Driving Wire

Current I₀ 100 A

Frequency 1.0 Hz

Loop Geometry

Distance d 0.020 m

Width w 0.100 m

Length L 0.200 m

Resistance 0.10 Ω

Show B field arcs

Show induced B inside loop

Loop

Width w 0.10 m

Height ℓ 0.060 m

Field Region

B 0.50 T

Region width 0.30 m

Velocity v 0.20 m/s

Driving Solenoid

Current I₀ 3.0 A

Frequency f 1.0 Hz

Turns/m n 1000

Radius r_s 0.050 m

Surrounding Loop

Resistance 0.10 Ω

Show B inside solenoid

← → switch modules · Space play/pause

Faraday's Law — Piecewise-Linear B(t) Through a Stationary Coil

AC Current in a Straight Wire — Inducing Current in a Nearby Loop

Loop Sliding Through a Localized Field Region — Φ(x) and ε(x)

Eddy Currents — Magnet Falling Through a Copper Tube

RL Circuit — Exponential Current Rise & Decay

Motional EMF — Sliding Rod on Rails

AC Generator — Rotating Coil in Uniform Field

Lenz's Law — Solenoid Through a Surrounding Loop