Electrical engineering
Voltage, current, resistance and electric power.
Direct current
Ohm's law, power, energy and resistor networks.
→18Alternating current
Reactance, impedance and power in AC circuits.
→6Three-phase circuits
Power and current in balanced three-phase systems.
→4Transformers
Turns ratio, currents and transformer power.
→4Magnetic circuits
Magnetic flux, MMF, field strength and reluctance.
→4Transformer EMF and flux
EMF equation, maximum flux, turns count and flux density.
→4Transformer losses and regulation
Copper and total losses, loading and voltage regulation.
→3Cables and lines
Conductor resistance, voltage drop and line losses.
→6Line voltage drop
Absolute and percentage drop in single- and three-phase lines.
→5Cable sizing and current
Cross-section from voltage drop, current density and allowable current.
→4Line losses
Loop resistance, power and energy losses, and transmission efficiency.
→2Electrical measurements
Shunts, voltage dividers and measurement calculations.
→4Ammeters and shunts
Ammeter range extension, shunt sizing, and meter movement current.
→4Voltmeters and series resistors
Voltmeter range extension, series resistance, and meter movement voltage.
→5Electrical machines
Synchronous speed, slip, shaft power and efficiency.
→5Reactive power compensation
Capacitor-bank power, current and required capacitance.
→5CAN bit timing
Prescaler, sample point and timing parameters for a CAN bus.
→4Kirchhoff laws and complete circuit
Node currents, loops, internal resistance and Joule heating.
→4RC/RL transients
Time constants, capacitor charging and current growth.
→4Resonance, quality factor and bandwidth
Phase angle, quality factor, bandwidth and decay.
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