STUPIDSID
1 (a)
Draw VI characteristics of SCR with and without gate control and mark holding current and latching current? Explain the difference between holding current and latching current?
4 M
1 (b)
Explain why cyclo converters are suitable only for low frequency applications?
4 M
1 (c)
Explain the meaning of following instructions
(i) LDA address.
(ii) MVI M, 12H.
(i) LDA address.
(ii) MVI M, 12H.
4 M
1 (d)
Realize Ex-OR gate by NAND gate.
4 M
1 (e)
Why RC triggering is preferred over resistance triggering process?
4 M
2 (a)
Explain single phase full wave fully controlled bridge rectifier with the help of circuit diagram and waveforms.
10 M
2 (b)
Explain the UJT relaxation circuit to trigger SCR along with appropriate waveform.
10 M
3 (a)
Explain with block diagram the armature control method of speed control of a DC shunt motor.
10 M
3 (b)
What is the difference between Natural and Forced commutation? Explain any two forced commutation techniques of SCR with waveforms.
10 M
4 (a)
Explain any two circuits using SCR for the speed control of single phase induction motor.
10 M
4 (b)
Draw the circuit diagram and explain the working of Jones chopper.
10 M
5 (a)
Discuss the thyristerised overload and over voltage protection of DC motor.
10 M
5 (b)
Explain important characteristics of OPAMP.
5 M
5 (c)
Draw a neat schematic diagram for OPAMP in inverting and non-inverting mode?
5 M
6 (a)
Which gates are called as universal gates? Why?
Using K-map reduce following Boolean function and implement it using NAND gate.
f(A,B,C)=Σm(0,1,3,4,5,6)
Using K-map reduce following Boolean function and implement it using NAND gate.
f(A,B,C)=Σm(0,1,3,4,5,6)
10 M
6 (b)
Explain the various interrupts of 8085.
5 M
6 (c)
Explain DeMorgan's theorem.
5 M
7 (a)
Explain architecture of 8085 microprocessor with block diagram.
10 M
7 (b)
Explain 555 timer as astable multivibrator.
10 M
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