Electrical Engineering Flashcards
6 cards from real BE/B Eng Bachelor of Engineering practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Electrical Engineering flashcards as text
What is the SI unit of electric charge?
Answer: Coulomb
The coulomb (C) is the SI unit of electric charge, equal to the charge transported by a current of one ampere in one second.
Ohm's Law states that voltage equals current multiplied by which quantity?
Answer: Resistance
Ohm's Law (V = IR) states that voltage equals current times resistance for a linear circuit element.
In a series RLC circuit at resonance, what is true about the impedance?
Answer: Impedance is at its minimum
At resonance in a series RLC circuit, the inductive and capacitive reactances cancel, leaving only resistance, so impedance is minimized.
Which theorem states that any linear two-terminal network can be replaced by an equivalent voltage source in series with an impedance?
Answer: Thevenin's Theorem
Thevenin's Theorem allows simplification of complex linear circuits into a single voltage source (Vth) in series with an equivalent resistance (Rth).
What does a transformer primarily use to transfer energy between circuits?
Answer: Mutual inductance
A transformer transfers electrical energy between circuits via mutual inductance through a shared magnetic core.
The power factor of a purely resistive AC circuit is:
Answer: 1
A purely resistive circuit has a power factor of 1 because voltage and current are in phase, so all power is real power.