BEE Electric Circuit Analysis 5

Question 1

Which theorem states that maximum power is transferred to a load when the load resistance equals the source's Thevenin resistance?

Accepted Answer

Maximum power transfer theorem

Answer

Maximum power transfer theorem states that PL is maximum when RL = Rth, yielding Pmax = Vth²/(4Rth).

Question 2

A sinusoidal voltage v(t) = 170 sin(377t) V. What is its RMS value?

Accepted Answer

120.2 V

Answer

VRMS = Vpeak/√2 = 170/√2 ≈ 120.2 V, which is the standard US household voltage.

Question 3

In a parallel RLC circuit, resonance occurs when:

Accepted Answer

BL = BC (susceptances are equal)

Answer

In a parallel RLC circuit, resonance occurs when the inductive susceptance BL equals the capacitive susceptance BC, making the total susceptance zero.

Question 4

KCL (Kirchhoff's Current Law) is based on conservation of:

Accepted Answer

Charge (current)

Answer

KCL states that the algebraic sum of currents at any node is zero, which is a consequence of conservation of charge.

Question 5

The phase angle of impedance Z = 3 + j4 Ω is:

Accepted Answer

53.13°

Answer

φ = arctan(X/R) = arctan(4/3) ≈ 53.13°, indicating the circuit is predominantly inductive.

BEE - Bachelor of Electrical Engineering Practice Test

BEE - Bachelor of Electrical Engineering Practice Test

BEE Electric Circuit Analysis 5