All Flashcards
What are the differences between an inductor and a capacitor?
Inductor: Stores energy in a magnetic field, resists changes in current. Capacitor: Stores energy in an electric field, resists changes in voltage.
What are the differences between LR and LC circuits?
LR Circuit: Contains inductor and resistor, current changes exponentially. LC Circuit: Contains inductor and capacitor, energy oscillates between them sinusoidally.
What are the differences between the energy stored in an inductor and a capacitor?
Inductor: (magnetic field). Capacitor: (electric field).
Compare the initial behavior of an inductor and a capacitor in a DC circuit.
Inductor: Acts like an open circuit initially. Capacitor: Acts like a short circuit initially.
Compare the final behavior of an inductor and a capacitor in a DC circuit.
Inductor: Acts like a wire (short circuit) after a long time. Capacitor: Acts like an open circuit after a long time.
What happens when current changes in an inductor?
An induced EMF is generated, opposing the change in current.
What happens when a switch is closed in an LR circuit?
The current increases exponentially towards a maximum value, determined by the time constant.
What happens when a switch is opened in an LR circuit?
The current decreases exponentially to zero, determined by the time constant.
What happens when energy is initially stored in the capacitor of an LC circuit?
Energy oscillates between the capacitor and inductor, leading to sinusoidal oscillations in charge and current.
What happens to the energy stored in an inductor if the current is doubled?
The energy stored is quadrupled (since ).
What is the effect of increasing the number of loops in an inductor coil?
Increases the inductance (L).
What is the effect of increasing the core size of an inductor?
Increases the inductance (L).
What happens when current changes rapidly through an inductor?
A large induced EMF opposes the change in current.
What happens when you connect an inductor and capacitor in series?
The circuit oscillates, with energy transferring between the inductor's magnetic field and the capacitor's electric field.
What is the effect of adding a resistor to an LC circuit?
The oscillations are damped, and energy is dissipated as heat.
What is the effect of doubling the current in an inductor?
The energy stored in the inductor quadruples.