FREE Bachelor of Electrical Engineering Basic Electrical Questions and Answers Flashcards
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Read the first 6 FREE Bachelor of Electrical Engineering Basic Electrical Questions and Answers flashcards as text
What is the SI unit of electrical capacitance?
Answer: Farad
The farad (F) is the SI unit of electrical capacitance, named after Michael Faraday.
In a purely resistive AC circuit, what is the phase angle between voltage and current?
Answer: 0 degrees
In a purely resistive circuit, voltage and current are in phase, meaning the phase angle is zero degrees.
Which theorem states that any linear bilateral network can be replaced by an equivalent voltage source in series with an impedance?
Answer: Thevenin's theorem
Thevenin's theorem simplifies a complex linear circuit to a single voltage source and series impedance.
What happens to the total resistance when resistors are connected in parallel?
Answer: It decreases below the smallest individual resistance
Parallel resistors always yield a total resistance smaller than the smallest individual resistor in the combination.
What is the time constant of an RC circuit with R = 10 kohm and C = 100 microfarads?
Answer: 1 second
The time constant tau equals R times C, so 10,000 ohms multiplied by 0.0001 farads equals 1 second.
Which material is most commonly used as a conductor in residential electrical wiring in the United States?
Answer: Copper
Copper is the standard conductor for US residential wiring due to its excellent conductivity, ductility, and cost-effectiveness.