Topic — Generation of electromotive forces from varying magnetic fluxes and oscillating circuits.
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18
Linked atoms
95 linked atoms.
18 Electromagnetic induction
- Alternator: from EMF peak to angular frequency
- Mechanical analogy: spring-LC
- Concentric rings with varying flux
- Self-induction and inductance
- Electronic scale with an inductive sensor
- Energy balance of the RLC circuit
- Circulation of E and the Faraday-Neumann-Lenz law
- RLC circuit: damped oscillations
- Eddy currents
- Magnetic constant μ₀ doubled
- Given i(t), find the inductance
- Bicycle dynamo
- Energy stored in an inductor
- Constant total energy in the LC circuit
- Differential equation of the driven RLC circuit
- Worked example: LC circuit, finding the natural frequency
- Worked example: Waltenhofen’s disc
- Worked example: magnet in a tube, terminal velocity
- Worked example: driven RLC, finding the generator’s EMF
- Worked example: a loop entering and leaving a field
- Phasors and graphs in the two cases
- Self-induced EMF in a solenoid
- EMF from flux B = 10t
- EMF on a moving rod
- s)
- Magnetic field flux
- Self-induction graphs
- The two cases, illustrated
- The three regimes of the RLC circuit
- The LC circuit and the oscillation equation
- The stationary wire beneath the magnet
- The fictitious generator
- The phasor method
- Lenz’s minus sign
- The lying voltmeter
- Inductance of a solenoid
- The alternator and the sinusoidal EMF
- Lenz’s law as a standalone principle
- Faraday’s resolution
- Lenz’s law as magnetic inertia
- Reading the exponential RL graph
- Magnet falling in a copper tube
- Why the current i is the same throughout the circuit
- Continuous inductive plane
- Average power in a sinusoidal regime
- Problem: Earth’s field and the train window
- Problem: capacitor of an AM radio receiver
- Problem: RL current on closing and opening
- Problem: phasor diagram (XL greater than XC)
- Problem: E(t) for a moving loop
- Problem: energy in a solenoid’s field
- Problem: EMF from a field B linear in time
- Problem: induced EMF over time (graph)
- Problem: flux through a rectangular loop
- Problem: natural frequency of an LC circuit
- Problem: the induction hob
- Problem: impedance and phase shift of a series RLC
- Problem: inductance of a solenoid (400 turns)
- Problem: inductor and capacitor (LC)
- Problem: the AM aerial at home
- Problem: the magnet in the copper tube
- Problem: the electric guitar
- Problem: damped magnetic pendulum
- Problem: ranking RMS current in RLC circuits
- Problem: ranking EMF of four square loops
- Problem: reactances of an RLC as omega varies
- Problem: a loop entering a field (qualitative)
- Problem: transformers with direct current
- Problem: true or false about induction (1)
- When eddy currents are an enemy
- When the electric field stops being conservative
- Ranking the rate of change of flux
- Ranking EMF from varying fluxes
- Reactances and impedance
- Series RLC resonance and quality factor
- Rod on rails: EMF and force
- Without Lenz’s law
- Solenoid with a ramping current
- Loops and magnet (braking force)
- Estimating the EMF in a hand-sized loop
- Closed surface and charge balance
- Voltage across an inductor
- A method for solving an induction problem
- RL transient: closing the switch
- RL transient: time constant
- Ideal transformer
- Three industrial applications
- Three experiments showing Lenz’s law at work
- Copper tube and plastic tube
- A charge and two points of view
- True or false about induction (2)
- Direction of current: two quick cases