FREE Bachelor of Electrical Engineering Basic Electrical Questions and Answers Flashcards
6 cards from real BEE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 FREE Bachelor of Electrical Engineering Basic Electrical Questions and Answers flashcards as text
What does a zener diode primarily regulate in a circuit?
Answer: Voltage
A zener diode operates in reverse breakdown to maintain a constant voltage across its terminals.
According to Kirchhoff's Current Law, what is the sum of currents entering a node?
Answer: Equal to the sum of currents leaving the node
Kirchhoff's Current Law states that the algebraic sum of currents at any node is zero, meaning currents in equal currents out.
What is the resonant frequency of a series RLC circuit with L = 1 mH and C = 1 microfarad?
Answer: Approximately 5,033 Hz
The resonant frequency is 1/(2*pi*sqrt(LC)), which equals approximately 5,033 Hz for these values.
What type of motor uses a commutator and brushes for operation?
Answer: DC motor
DC motors use a commutator and brushes to reverse current direction in the armature windings for continuous rotation.
In a balanced three-phase system, what is the phase angle between consecutive phases?
Answer: 120 degrees
A balanced three-phase system has three voltages separated by 120 degrees, equally dividing the 360-degree cycle.
What is the power factor of a circuit with 500 W real power and 1000 VA apparent power?
Answer: 0.5
Power factor equals real power divided by apparent power, so 500 W divided by 1000 VA equals 0.5.