Electrical Engineering Quiz & Flashcards

Ohm is the unit for resistance, while watt, volt, and ampere measure power, voltage, and current respectively.

Transistors are used to amplify signals; they do not store energy, convert AC/DC, or measure current.

The skin effect occurs in conductors, causing AC current to flow near the surface.

Rectifiers convert AC to DC; they do not store energy or alter voltage/current directly.

Kirchhoff's Current Law deals with current at junctions; the others address different phenomena.

Capacitors store energy in an electric field; they do not rectify, measure, or amplify.

Transformers work via electromagnetic induction, not capacitance, thermal conduction, or ohmic heating.

A short circuit causes excessive current; it does not increase resistance or amplify signals.

Phase difference indicates timing differences between waveforms, not voltage, current, or frequency changes.

Zener diodes regulate voltage, maintaining a constant value even with fluctuations in current.

Capacitors are key in signal filtering, unlike inductors, resistors, or transformers.

Thermistors measure temperature, not voltage, current, or frequency.

Slip rings transfer signals to rotating components; they don't increase resistance, amplify voltage, or rectify current.

Synchronous motors operate at constant speed; they don't change speed with load or store energy.

The Joule effect causes heat from current flow; the others involve different phenomena.

Operational amplifiers amplify signals; they don't store charges or measure frequency.

Fuses protect against overcurrent; they don't store energy or convert DC/AC.

Inductors oppose changes in current; capacitors store energy, resistors oppose current flow, and diodes control directionality.

Heat sinks dissipate heat, preventing overheating; they don't store energy or amplify signals.

Farads measure capacitance; resistance, inductance, and conductance have different units.

Photovoltaic cells convert light to electricity; the others function differently.

Transformers change voltage levels; they don't store energy or convert AC/DC.

Volts measure electrical potential; ohms, watts, and amperes measure other properties.

Capacitors block DC but allow AC to pass; resistors, inductors, and diodes behave differently.

In series circuits, one failure breaks the circuit; voltage, not current, is divided, and it uses fewer wires.

Insulators have high resistance, preventing current flow; they don't have high conductivity, capacitance, or inductance.

Faraday's Law describes electromagnetic induction in inductors, unlike the other laws.

A -90 degree shift indicates capacitive reactance; inductive reactance, ohmic resistance, and power factor relate differently.

Bridge rectifiers convert AC to DC; they don't store energy, or change voltage or current directly.

Relays switch circuits; they don't measure resistance, store energy, or alter frequency.

Zener diodes regulate voltage; the others serve different functions.

Loads consume electrical power; they don't store energy, convert AC/DC, or increase voltage.

Grounding provides safety, preventing shocks; it doesn't alter voltage, current, or store energy.

Electric motors operate on electromagnetic induction; the other principles apply differently.

Resistors limit current; capacitors, inductors, and diodes have various other functions.

Diodes allow current in one direction; they don't store energy or measure frequency.

Increasing frequency increases an inductor's impedance due to its reactive nature.

In parallel circuits, voltage is consistent across components; current varies, and resistance calculations differ.

Surge protectors prevent voltage spikes; they don't store energy or directly affect current/resistance.

Galvanometers measure current; they don't measure voltage, resistance, or capacitance.

RC time constants involve capacitors and resistors; other combinations function differently.

Conductance measures how easily current flows; resistance opposes it, and storage/regulation are separate concepts.

Voltage regulators maintain constant voltage; they don't affect current, resistance, or inductance directly.

Transducers convert energy forms; they don't store energy or measure voltage/frequency.

Reactance opposes AC, not DC; energy storage and voltage reduction are separate functions.

Inductors store energy in magnetic fields; they don't convert or rectify current, or measure voltage.

Oscilloscopes display waveforms; they don't directly display current, resistance, or capacitance.

Resistors limit current; they don't store energy or amplify/rectify signals.

Resistance causes voltage drops; capacitance, inductance, and frequency have different effects.

Power factor is the ratio of real to apparent power; it doesn't measure frequency or store energy.

Circuit breakers protect against overcurrent; they don't address voltage spikes, frequency, or capacitance changes.

Bandwidth refers to frequency range; it doesn't relate to storage, current, or voltage regulation.