Electrical Engineering Answers

Design a sequential circuit with two D flip-flops A and B, one input x, and one output y. When x = 0, the state of the circuit remains the same with output y=1. When x = 1, the circuit goes through the state transitions with output y=0. The state transitions from 00 to 01, to 11, to 10, back to 00, and repeats. 

IN Resonance circuit If L=6H, C= 7 mF,

angular resonance frequency (ws) is:

Select one:

a. ws= 5.8 rad/sec

b. ws= 4.88 rad/sec

C. ws= 6.8 rad/sec NIC

d. ws = 8.9 rad/sec

A three-phase system has an effective line

voltage of 240 V, and is connected to a

balanced delta load which draws 5 kW at a

power factor of 0.8, then the line current is:

Select one:

a. 13.88 A

b. 16.4 A

c. 12.89 A

d. 15.04 A

e. 12.03 A

For high-pass active filter with corner

frequency 8 kHz, then R and C are:

Select one:

a. 2.5 k Ω , 7.9557 nF

b. 2 k Ω , 7.9557 nF

c. 5 k Ω , 7:9557 nF nF

d. 10 k Ω , 7.9557 nF

e. 1 k Ω ,7.9557 nF

Design a sequence detector by using JK flip-flops. The sequence detector has one input x and one output y. When a sequence equivalent to least significant 4 bits of your roll number (*after converting your roll number to base-2) is detected at the streaming input x the output y is set to high (y=1). Unless the desired sequence is detected, the output y remains low (i.e., y=0). The detector should also be capable of detecting the overlapping sequences (if applicable) received at the input.

a) Draw state flow diagram (optimized)

b) Draw state transition table.

c) Find minimized expressions for inputs of flip-flops and output of the circuit.

d) Draw circuit diagram. 

my roll number is 029 convert this into base 2 and design the sequence detector for least 4 bits sequence.

A transformer has a voltage 480 V and

current 2.5 A on the primary side. And 80 V

on the secondary. What is the secondary

current on the load.

Select one:

a. 30 A

b. 20 A

C. 15 A

d. 10 A

e. 5 A

For low-pass RL filter with R = 20 Ω and L = 2 mH , the corner frequency is:

Select one:

a. 3,979 Hz

b. 796 Hz

c. 1,592 Hz

d. 19,894 Hz

e. 7.958 Hz

 A sinusoidal voltage having a maximum amplitude of 625 V is applied to the terminals of a 50 Ω

 The average power delivered to the resistor is:

 Select one:

 a 19531.25 W

 b 6510.42 W

 c 3906.25 W

 d 9765.63 W

 e 4882.61 W

An electrical load operates at 240 V rms The load absorbs an average of 8 Kw at lagging power factor of 0.9 The load impedance is:

 Select one:

 A 5.04 L 45 57 °Ω

 B 3.6 L 60 °Ω

 C 5.76 L 36.87 °Ω

 D 4.32 L 53.13 °Ω

 E 6.48 L 25.84 °Ω

An electrical load operates at 240 V rms. The load absorbs an average of 5 KW at lagging power factor of 0.8 The reactive power Q is:

 Select one

 a 3.75 KVAR

 b 4.50 KVAR

 c 6.00 KVAR

 d 6.75 KVAR

 e 5.25 KVAR