STUPIDSID
1(a)
Draw fullwave rectifier diagram and discuss it in brief.
2 M
1(b)
What do you know about SMPS?
2 M
1(c)
What is a switching regulator?
3 M
Solve any one question from Q.1(d) & Q.1(e)
1(d)
Describe working of basic Op-Amp shunt regulator circuit.
7 M
1(e)
Calculate the O/P voltage and current in the following current . Image
7 M
2(a)
What is SCR? Discuss it in brief.
2 M
2(b)
Discuss types of commutation.
2 M
2(c)
Compare between thyristor and transistor.
3 M
Solve any one question from Q.2(d) & Q.2(e)
2(d)
In a unijunction transistor the value of the base current=2mA, VBB=15V. Find the value of the intrinsic stand off ratio if RBI=6kΩ, Determine also value of peak voltage.
7 M
2(e)
Find the power rating of an SCR if the rms value of current through the SCR is 50 amp when connected across a voltage 230 sin314t supply.
7 M
3(a)
What is triacs an diacs?
2 M
3(b)
How IGBT works? Explain.
2 M
3(c)
Compare between power MOSFET and power transistor.
3 M
Solve any one question from Q.3(d) & Q.3(e)
3(d)
Calculate the cycle surge current rating and I2t rating of an SCR having half cycle surge current rating of 2000 amperes for 50Hz supply.
7 M
3(e)
Four thyristors each of which posses rating of 1000V are connected in series. The total voltage of the string is 3200V. What is the value of the string efficiency.
7 M
4(a)
What is CMRR in Op-Amp?
2 M
4(b)
What is the application?
2 M
4(c)
What is a tracking regulation?
3 M
Solve any one question from Q.4(d) & Q.4(e)
4(d)
In the astable mode of operation of an IC555 timer if R1=1.5kΩ R2=2.2kΩ. Calculate the duty cycle.
7 M
4(e)
A series voltage regulator is required to supply a current of 1 A at constant voltage of 6V. If the supply voltage is 10V and the zener operates in the breakdown region, design the circuit. Assume β=50, VBE=0.5V and minimum zener current=10mA.
7 M
5(a)
What are he advantages of PLC over conventional relays?
2 M
5(b)
What are the factors for selecting PLC?
2 M
5(c)
Discuss the role of microprocessors in PLC memory.
3 M
Solve any one question from Q.5(d) & Q.5(e)
5(d)
Discuss in detail the process control application of the PLC.
7 M
5(e)
Discuss ladder logic language with suitable example.
7 M
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