DC basics · 3 min read
Ohms Law Current: the method, worked through
Ohm's law predicts current through an ideal linear resistor at a given voltage.
30 illustrated guides
Bench notes
Work through the formula, compare a few scenarios and know where the model stops.
DC basics · 3 min read
Understanding ohms law voltage
The voltage drop across a linear resistor follows the product of current and resistance.
DC basics · 3 min read
Ohms Law Resistance: from inputs to a useful answer
A voltage-current pair determines the effective resistance of an ohmic component.
Power · 3 min read
A practical guide to dc electrical power
DC power is the rate of electrical energy transfer at a fixed voltage and current.
Power · 3 min read
How resistor power from current works
Resistive heating grows with the square of current.
Power · 3 min read
Resistor Power from Voltage: the method, worked through
A resistor exposed to a fixed voltage dissipates power inversely proportional to its resistance.
Resistors · 3 min read
Understanding series resistance
Resistors in a single current path add directly.
Resistors · 3 min read
Parallel Resistance: from inputs to a useful answer
Parallel resistors share the same voltage and add their conductances.
Resistors · 3 min read
A practical guide to three parallel resistors
Three parallel branches contribute conductance to a shared pair of nodes.
Resistors · 3 min read
How voltage divider works
An unloaded two-resistor divider sets a fraction of the input voltage at its midpoint.
Resistors · 3 min read
Divider Lower Resistor: the method, worked through
Rearranging the divider relation finds the lower resistor for a target unloaded voltage.
Resistors · 3 min read
Understanding led series resistor
A series resistor drops the supply voltage remaining after an LED's forward drop.
Power · 3 min read
LED Resistor Dissipation: from inputs to a useful answer
The resistor dissipates the voltage it drops multiplied by the LED current.
Resistors · 3 min read
A practical guide to resistance tolerance span
Tolerance describes the permitted deviation from a nominal resistor value.
Capacitors · 3 min read
How capacitors in parallel works
Parallel capacitors share a voltage while their stored charges add.
Capacitors · 3 min read
Capacitors in Series: the method, worked through
Ideal series capacitors carry equal charge, giving reciprocal addition of capacitance.
Capacitors · 3 min read
Understanding capacitor charge
Capacitance relates stored charge to voltage across the capacitor.
Capacitors · 3 min read
Capacitor Stored Energy: from inputs to a useful answer
Energy stored in an ideal capacitor grows with the square of voltage.
Timing · 3 min read
A practical guide to rc time constant
The RC time constant sets the speed of a first-order charging or discharging response.
Timing · 3 min read
How rc charging voltage works
A capacitor initially at zero volts approaches a fixed supply exponentially through a resistor.
Timing · 3 min read
RC Discharging Voltage: the method, worked through
An initially charged capacitor loses voltage exponentially through an ideal resistance.
Filters · 3 min read
Understanding rc low-pass cutoff
A first-order RC low-pass cutoff is the frequency where amplitude falls to one over the square root of two.
AC basics · 3 min read
Capacitive Reactance: from inputs to a useful answer
An ideal capacitor's reactance magnitude decreases as frequency rises.
AC basics · 3 min read
A practical guide to inductive reactance
An ideal inductor's reactance magnitude increases with frequency.
Inductors · 3 min read
How inductor stored energy works
An ideal inductor stores energy in its magnetic field.
Inductors · 3 min read
Series Inductance: the method, worked through
Uncoupled series inductors add their inductances.
Inductors · 3 min read
Understanding parallel inductance
Uncoupled ideal parallel inductors combine by reciprocal addition.
Timing · 3 min read
RL Time Constant: from inputs to a useful answer
An RL time constant sets the exponential current response in a first-order circuit.
Filters · 3 min read
A practical guide to lc resonant frequency
An ideal LC pair exchanges energy between electric and magnetic storage at its natural resonance.
AC basics · 3 min read
How series rlc impedance works
The impedance magnitude combines resistive and net reactive parts at a specified frequency.
No matching articles. Try a shorter search or choose all categories.