Set 4

Question 1 of 100

A star-connected load has a phase impedance of 10 Ω resistive. Connected to a 415 V (line) three-phase supply, the total three-phase active power consumed is approximately:

Question 2 of 100

In applying the Superposition Theorem to a circuit with two sources, the procedure requires:

Question 3 of 100

The RMS value of a sinusoidal voltage with peak value Vm is:

Question 4 of 100

A transistor in saturation mode has both junctions:

Question 5 of 100

In a CMOS inverter, when the input is logic HIGH, the circuit state is:

Question 6 of 100

An RC phase-shift oscillator requires a minimum of how many RC stages to produce 180° of phase shift for sustained oscillation?

Question 7 of 100

A Class A amplifier has a quiescent collector current of 50 mA and supply voltage of 12 V. Its maximum theoretical efficiency is:

Question 8 of 100

In a parallel RLC circuit at resonance, the impedance is:

Question 9 of 100

The delta-to-star (Δ→Y) conversion formula for one star resistor Ra (connected to node A) in terms of delta resistors RAB, RBC, RCA is:

Question 10 of 100

In a non-inverting op-amp amplifier configuration with R1 = 4 kΩ and Rf = 16 kΩ, the voltage gain is:

Question 11 of 100

The minimum number of NAND gates required to implement a two-input XOR function is:

Question 12 of 100

In a synchronous counter, all flip-flops are clocked:

Question 13 of 100

A 3-to-8 line decoder with active-low outputs is used in a memory interface. When address lines A2A1A0 = 101, which output line is asserted (LOW)?

Question 14 of 100

In 8085 assembly language, the instruction MOV A, M performs:

Question 15 of 100

The propagation delay in a 4-bit ripple carry adder grows with the number of bits because:

Question 16 of 100

In the 8085 microprocessor, the READY signal is used to:

Question 17 of 100

An edge-triggered D flip-flop samples its input D at:

Question 18 of 100

In memory-mapped I/O, peripheral devices are accessed using:

Question 19 of 100

The signed 8-bit two's complement representation of decimal -45 is:

Question 20 of 100