Electrical Circuits and Systems Flashcards
6 cards from real Fundamentals 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 Circuits and Systems flashcards as text
What is the unit of electrical capacitance in the SI system?
Answer: Farad (F)
Capacitance is measured in Farads (F), named after Michael Faraday.
In digital logic, what is the output of a NAND gate when both inputs are HIGH (1)?
Answer: 0 (LOW)
A NAND gate outputs LOW (0) only when all inputs are HIGH (1); for all other combinations it outputs HIGH.
What is the maximum power transfer theorem?
Answer: Maximum power is delivered to the load when the load resistance equals the source (Thevenin) resistance
The maximum power transfer theorem states that power to the load is maximized when R_L = R_th (load equals Thevenin resistance).
What is the voltage divider formula for the voltage across R₂ in a series circuit of R₁ and R₂?
Answer: V₂ = V_s × R₂/(R₁ + R₂)
The voltage divider rule gives V₂ = V_s × R₂/(R₁ + R₂), proportional to the fraction of total resistance.
In Boolean algebra, which law states that A + A·B = A?
Answer: Absorption law
The absorption law A + AB = A simplifies Boolean expressions by absorbing redundant terms.
What is the cutoff frequency of a first-order RC low-pass filter with R = 1 kΩ and C = 1 μF?
Answer: ~159 Hz
f_c = 1/(2πRC) = 1/(2π × 1000 × 10⁻⁶) = 1/(2π × 10⁻³) ≈ 159 Hz.