Electrical Engineering Answers

Explain the effects of oxidation on the behaviour and properties of two different metals. 

• You should identify specific applications to describe the effects on each metal.

• Use relevant diagrams to support your findings.

• Write at least 500 words.

Q.4 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.

Q.3 Design a sequential circuit by using JK-flip flop which can detect a sequence of three or more consecutive 1’s in a string of bits coming through an input line.

Q.2 Design a sequential circuit by using T-flip flop which can detect a sequence of three or more

consecutive 0’s in a string of bits coming through an input line.

A PN flip-flop has four operations: clear to 0, no change, complement, and set to 1, when

inputs P and N are 00, 01, 10, and 11, respectively.

(a) Tabulate the characteristic table.

(b) Derive the characteristic equation.

(c) Tabulate the excitation table.

(d) Show how the PN flip-flop can be converted

to a D flip-flop.

If an amplifier working with ±5 V DC power supplies requires a minimum output voltage of 2.3 V across a load resistance of 185 ohms, calculate the minimum average current to be drawn from each power supply, if the efficiency of the amplifier is 50 %.

Select the rating of the fuse, keeping in view the standards of fuse rating manufactured by manufacturers, to protect a resistive circuit having 18 A full load current.

Multi Line Text.

(1 Point)

If you are given two cartridge fuses of unequal lengths, discover, by stating reason (s), which one might be a high voltage fuse.

Multi Line Text.

(2 Points)

Write a program that takes the value of positive integer N and outputs the sum of the first N good numbers.

A 4-pole shunt motor is lap-wound with 728 conductors, and has a flux of 25 mWb per

pole. The armature takes 50 Amp in current, the resultant demagnetizing effect due to

armature reaction reduces the air gap flux by 5%. What is developed torque of this

motor?