The Commission publishes this paper without an answer key, so no answers are shown.
1. What is meant by forward energy gap in semiconductor and what is the forbidden band gap energy of silicon ? (2)
2. Define CMRR of an operational amplifier. (2)
3. Implement NOT gate using NAND gate. (2)
4. Define modulation index of amplitude modulation. (2)
5. What is a watchdog timer in a microcontroller ? (2)
6. What is sampling theorem ? What is the minimum sampling frequency for the proper reconstruction of an analog signal of 1 kHz ? (4)
7. The collector current of a CE transistor is given as 10 mA and base current is given as 50 μA. Define and find β value of the transistor. (4)
8. What is race-around condition in J-K flip flop ? (4)
9. Why CAN bus is selected as an industrial bus in embedded systems ? (4)
10. A system is represented by the equation, y(t) = t x(t). Check whether the system is linear or not ? (4)
11. What is meant by base width modulation ? (5)
12. Find the transfer function for the system with output y(t) and input x(t): d²y/dt² + 2dy/dt + y(t) = 5dx/dt + x(t). (5)
13. Why optic fiber is preferred over copper cables ? (5)
14. What is the difference between Harvard architecture and Von Neumann architecture in microprocessors ? (5)
15. Convert the given decimal number to equivalent binary value: 127₁₀ (5)
16. Draw the inverting amplifier using an op amp. Write the equation for the gain of the amplifier. (5)
17. Illustrate BPSK signaling scheme for the binary data: 1 1 0 1 0 1 (5)
18. Illustrate total internal reflection in optic fiber with Snell's law. (7)
19. Draw and explain the circuit of an astable multivibrator using transistors. (7)
20. Explain the concept of a cell in cellular communication. What is frequency reuse ? (7)
21. What is geostationary satellite ? What are conditions for geostationary ? Explain with
applications. (7)
22. Design a Full-Adder using gates. (7)
23. Draw and explain superheterodyne receiver system. (10)
24. Write a C program to find the factorial of a number. (10)
25. Draw and explain a bridge rectifier. Write the expression for ripple factor. (10)
26. Explain principle of operation of Switched Mode Power Supply (SMPS) with B/D. (10)
27. What is meant by doping? Draw and explain the energy band diagram for n-type and p-type semiconductors. (10)
28. Explain the delta modulation with necessary diagrams. (10)
29. Design and draw the circuit for a 4-bit ring counter using D flip flop. (10)
30. Design a 555 IC based system to generate a waveform with 75% duty cycle. (10)
31. Draw and explain a RC coupled CE amplifier. (10)
32. Maxwell's equations – state and write equations. (10)
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