Topology
What is the representation of a circuit using branches and nodes?
➡️ An undirected graph
What is the SI unit of electric charge?
The Coulomb (C)
What type of circuit has an incomplete path for current flow?
An open circuit
Where do circuit components (resistors, sources) reside?
In the branches
What is the charge of a single electron?
−1.6 × 10⁻¹⁹ C
Which circuit type is used in household wiring and why?
Parallel circuits, because components operate independently
What do nodes represent in an electrical circuit?
Wires / connection points
Why is absolute voltage considered a fiction?
Voltage is only defined between two points
Which component stores energy in an electric field?
A capacitor
Why are wires considered equipotentials?
Because the voltage is the same everywhere along the wire
What is the formula for electrical power?
P = V × I
Which component opposes changes in current?
An inductor
What does a circuit consist of in terms of topology?
A mesh of loops
How is electric current defined mathematically?
The time derivative of charge
What is the key difference between a BJT and a FET?
A BJT is current-controlled, while a FET is voltage (electric-field) controlled