All Flashcards
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.
Describe the energy oscillation in an LC circuit.
Energy oscillates between the capacitor's electric field and the inductor's magnetic field, leading to sinusoidal variations in charge and current.
Describe how to find the induced EMF in an inductor.
Apply Faraday's Law to the inductor:
What happens when the switch is closed in an LR circuit?
Current flows, and the inductor stores energy in its magnetic field. The current increases exponentially according to
How does an inductor behave initially in a circuit?
Initially, an inductor acts like an open circuit, resisting current flow.
How does an inductor behave after a long time in a circuit?
After a long time, an inductor acts like a wire, allowing current to flow freely.
How to calculate the energy stored in an inductor?
Use the formula:
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 ).