STUPIDSID
Answer any four of the following:-
1 (a)
Explain SCR as rectifier and give significance of freewheeling diode.
5 M
1 (b)
What are the open loop configurations of OPAMP? Explain any one with circuit diagram.
5 M
1 (c)
What are the advantages of electronic control of a motor?
5 M
1 (d)
What do you mean by cycloconverter? Explain reasons of limited applications of cycloconverters.
5 M
1 (e)
A SCR circuit has 20 A load current 400 V d.c. voltage and 190µs turn off time of the device. Determine the value of the commutating capacitor.
5 M
2 (a)
Explain construction, working and applications of TRIAC.
10 M
2 (b)
Explain with the help of block diagrams armature and field control of a DC shunt motor.
10 M
3 (a)
What do you mean by commutation of SCR? Classify and explain all commutation circuits of SCR.
10 M
3 (b)
Explain in detail working of a dual converter circuit.
10 M
4 (a)
Explain in detail the overload protection of DC motor.
10 M
4 (b)
Explain improved series inverter circuit.
10 M
5 (a)
Explain 555 timer as monostable multivibrator with waveforms.
10 M
5 (b)
Derive the expression for OPAMP as an integrator.
10 M
6 (a)
Realize all basic gates with NOR gate.
10 M
6 (b)
What are the advantages of digital system? Compare different digital expression reduction technique and explain the effective method.
10 M
7 (a)
Explain the architecture of 8085 Microprocessor.
10 M
7 (b)
Explain in detail interrupts of 8085 microprocessor.
10 M
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