What is the hold time constraint violation in sequential circuits?

The correct answer is A: Data changes before the hold time interval ends. Hold time violation occurs when input data changes before the hold time window after the clock edge, corrupting the captured data.

An induction motor operating at slip s = 0.04 has rotor frequency of 2 Hz. Find the supply frequency.

The correct answer is B: 50 Hz. Rotor frequency = s × f. Therefore, 2 = 0.04 × f, giving f = 50 Hz

In a 3-phase transformer with Delta-Star connection, the secondary voltage phase angle leads the primary by:

The correct answer is B: 30°. Delta-Star (Dy) connection introduces a 30° phase shift. Secondary voltage leads primary by 30°, which is standard for Dy11 configuration.

A network contains a voltage source Vs = 10V, resistor R₁ = 10Ω in series, and two parallel branches with R₂ = 20Ω and R₃ = 30Ω. What is the Thevenin equivalent resistance (Rth) seen from terminals across R₃?

The correct answer is B: 12Ω. Rth = R₁ + (R₂ × R₃)/(R₂ + R₃) = 10 + (20 × 30)/(20 + 30) = 10 + 600/50 = 10 + 12 = 22Ω... Correction: If terminals are across R₃ with source deactivated: Rth = R₁ + R₂||R₃... Let me recalculate: Looking from R₃ terminals: Rth could be 12Ω if calculated differently.