GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Engineering Past Paper PDF

## GUJARAT TECHNOLOGICAL UNIVERSITY ### Diploma Engineering - SEMESTER - 1/2 - EXAMINATION – Winter-2023 **Subject Code:** 4300018 **Subject Name:** Fundamentals Of Electrical And Electronics **Date:** 19-01-2024 **Time:** 10:30 AM TO 01:00 PM **Total Marks:** 70 **Instructions:** 1. Attempt all q...

## GUJARAT TECHNOLOGICAL UNIVERSITY ### Diploma Engineering - SEMESTER - 1/2 - EXAMINATION – Winter-2023 **Subject Code:** 4300018 **Subject Name:** Fundamentals Of Electrical And Electronics **Date:** 19-01-2024 **Time:** 10:30 AM TO 01:00 PM **Total Marks:** 70 **Instructions:** 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Use of programmable & Communication aids are strictly prohibited. 5. Use of non-programmable scientific calculator is permitted. 6. English version is authentic. 7. Bloom's Taxonomy - R = Remember, U = Understanding, A = Apply and above | Q.1 | | Marks | |---|---|---| | (a) | Compare Active and Passive components. | 03 | | (b) | Define Current and Voltage with their symbol and units. | 03 | | (c) | Explain Resistor, Inductor and capacitor as a passive component and give one example for each. | 04 | | OR | | | | (c) | Explain KVL and KCL by giving one example. | 07 | | Q.2 | | Marks | |---|---|---| | (a) | Draw VI characteristic of PN junction diode. | 03 | | (b) | Describe various types of signals with their Parameters. | 03 | | (c) | Classify various diodes and compare them. | 04 | | OR | | | | (a) | Define 1. Intrinsic semiconductor 2. Extrinsic Semiconductor 3. Semiconductor devices with examples. | 03 | | (b) | Explain the series and parallel connection of resistors. | 03 | | (c) | Explain 1. Depletion layer 2. Knee Voltage 3. Doping | 04 | | Q.3 | | Marks | |---|---|---| | (a) | Define IC and List its types. | 03 | | (b) | Show an application of a Transistor and justify it. | 03 | | (c) | Design any rectifier circuit and show its waveforms. | 04 | | OR | | | | (a) | Define PCB and List its types. | 03 | | (b) | Derive the relation between α and β. | 03 | | (c) | Show an application of a Diode and justify it. | 04 | | Q.4 | | Marks | |---|---|---| | (a) | Establish the relationship between sustainability and E-Waste. | 03 | | (b) | Draw circuits for CE configuration of NPN and PNP transistor. | 04 | | (c) | Explain CE configuration with i/p and o/p characteristics. | 07 | | OR | | | | (a) | Justify the concept of need for Electronics waste. | 03 | | (b) | Draw neat symbol of NPN and PNP transistor by labeling their terminals and showing direction of current. | 04 | | (c) | Explain working of PNP and NPN transistor in detail. | 07 | | Q.5 | | Marks | |---|---|---| | (a) | Draw functional block diagram of IC 555 and explain 555 as monostable multivibrator. | 03 | | (b) | Discuss methods to manage E-Waste. | 03 | | (c) | Differentiate between different logic families. | 04 | | OR | | | | (a) | Discuss methods for disposal E-Waste. | 03 | | (b) | Discuss different types of cables and connectors. | 03 | | (c) | Differentiate various IC technologies. | 04 | **Q.2.b** State the classification of capacitors with examples. **Q.2.b.or** Explain factors affecting the resistance. **Q.4. a** Explain transistor as an amplifier. **Q.4. a.or **Explain the working of PN junction diode in forward bias and reverse bias connection. **Q.5. a.or** Draw & explain the circuit of IC 555 timer with relay. **Q.5. b.** Draw the circuit of sequential timer for four stages using IC 555. **Q.5. c.** Draw the circuit of astable multivibrator using IC 555 and explain its working. ## GUJARAT TECHNOLOGICAL UNIVERSITY ### Diploma Engineering – SEMESTER – 1 (NEW) EXAMINATION – Summer-2023 **Subject Code:** 4300018 **Subject Name:** FUNDAMENTALS OF ELECTRICAL AND ELECTRONICS **Date:** 08-08-2023 **Time:** 10:30 AM TO 01:00 PM **Total Marks:** 70 **Instructions:** 1. Attempt all questions. 2. Make suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Use of programmable and communication aids are strictly prohibited. 5. Use of non-programmable scientific calculator is permitted. 6. English version is authentic. | Q.1 | | Marks | |---|---|---| | (a) | Draw Symbols of Zener Diode, Tunnel Diode & NPN transistor. | 03 | | (b) | Explain disposal of E-Waste. State Faraday's laws of electromagnetic Induction | 04 | | (c) | What is PN Junction diode? Explain V-I characteristics of PN Junction diode. | 07 | | OR | | | | (c) | What is tunneling? Explain V-I characteristics of Tunnel Diode. | 07 | | Q.2 | |Marks | |---|---|---| | (a) | State & Explain Ohm's Law with its limitations. | 03 | | (b) | What is passive component? Explain Inductor as a passive component. | 03 | | (c) | Explain Bridge wave rectifier with its input & output waveform. | 04 | | OR | | | | (a) | Explain Kirchoff's Current Law. | 03 | | (b) | Write rules to decide sign for emf and voltage drop by a resistor in KVL. | 03 | | (c) | Explain V-I characteristics of Zener diode and Zener diode as a voltage regulator. | 04 | | Q.3 | | Marks | |---|---|---| | (a) | What is necessity of filter? Explain L-filter. Draw & Explain low pass filter. | 03 | | (b) | Give comparison between LED & LASER. | 04 | | (c) | (i) Explain PNP transistor. | 03 | | | (ii) Explain N type semiconductor. | 03 | | OR | | | | (a) | Explain Conductor, Insulator and semiconductor with energy band diagram. | 03 | | (b) | Define Valence electron free electron | 03 | | (c) | Classification of Capacitor with examples. | 03 | | Q.4 | | Marks | |---|---|---| | (a) | Explain working of photo diode. | 03 | | (b) | Explain input & output characteristics of CE configuration of transistor. | 04 | | (c) | Define Cycle, Frequency, Time Period & wavelength with their full-wave rectifier-CE configuration. Draw and explain full-wave rectifier and half-wave rectifier. | 07 | | (d) | (i) Draw & Explain construction of coaxial cable. | 03 | | | (ii) Explain working principle of Fiber Optics cable. Explain the working of a varactor diode. | 04 | | OR | | | | (a) | Explain transistor as an amplifier | 03 | | (b) | Draw sine wave, square-wave, triangular-wave, sawtooth wave. | 04 | | (c) | (i) Explain RJ-45 connector. | 04 | | | (ii) Give comparison between UJT and PNP transistor. | 03 | | | (iii) Explain different types of biasing required for transistor. | 04 | | Q.5 | | Marks | |---|---|---| | (a) | What is IC? List and explain different generations used in IC. | 03 | | (b) | Explain Diode Transistor Logic Family. | 04 | | (c) | Three resistors-32, 65, 92, connected in parallel connection with 18V supply. Find out total equivalent resistance, total current and current passing through each resistor. | 07 | | OR | | | | (a) | What is PCB? Write method to fabricate single-layer PCB. | 03 | | (b) | Define Fan-in, Fan-out, Propagation Delay, Noise margin. | 04 | | (c) | Four resistors-100, 150, 200, 300 connected in series connection with 60V supply. Find out total equivalent resistance, total current and voltage drop by each resistor. | 07 | **Q.5. a.** Draw the circuit of IC 555 timer as bistable multivibrator. **Q.5. b.** Draw the pin connection of IC 555 and explain functional block diagram of IC 555 timer. **Q.5. a. or.** Draw & explain the circuit of IC 555 timer as monostable multivibrator. **Q.5. b. or.** Draw & explain the circuit of IC 555 timer with relay. **Q.5. c. or.** Draw & explain astable multivibrator circuit.