Fundamentals of Engineering Electrical Circuits and Systems

Question 1

What is Ohm's Law?

Accepted Answer

V = IR

Answer

Ohm's Law states that voltage equals current times resistance: V = IR.

Question 2

Three resistors of 6 Ω, 3 Ω, and 2 Ω are connected in parallel. What is the equivalent resistance?

Accepted Answer

1 Ω

Answer

1/R_eq = 1/6 + 1/3 + 1/2 = 1/6 + 2/6 + 3/6 = 6/6 = 1, so R_eq = 1 Ω.

Question 3

Kirchhoff's Voltage Law (KVL) states that:

Accepted Answer

The sum of all voltages around any closed loop is zero

Answer

KVL is based on conservation of energy: the algebraic sum of all voltage drops around a closed loop equals zero.

Question 4

What is the impedance of an ideal capacitor C at angular frequency ω?

Accepted Answer

1/(jωC)

Answer

The impedance of a capacitor is Z_C = 1/(jωC), which decreases with increasing frequency.

Question 5

In an AC circuit, power factor is defined as:

Accepted Answer

cos(θ), where θ is the phase angle between voltage and current

Answer

Power factor = cos(θ), where θ is the phase angle between voltage and current; it ranges from 0 to 1.

Fundamentals of Engineering Practice Test