SAMPLE QUESTION PAPER I Marks : 70 Time: 3 Hours Q.1) A) Attempt any FIVE of the following. a) Define active components. b) List different types of resistors. c) Describe method to test following passive components using multimeter. 1. Resistor 2. Capacitor 3. Inductor d) List standard values of inductor available in market. e) State the applications of Laser diode. f) List the types of rectifiers. g) State specifications of PIN diode. a) Explain the construction of LDR with sketch. b) Explain working of electrolytic capacitor. c) List different types of capacitor. d) Sketch input/output waveforms for half and full wave rectifiers. 10 Marks Q.3) Attempt any THREE of the following a) State the Faradays law of electromagnetic induction and explain applications of it. b) Describe the construction of air core inductor with sketch. c) Draw symbol of following diodes. a. Zener diode b. Tunnel diode c. Photodiode d. Laser diode 1
d) Centre tap and bridge type circuits having the same load resistance and transformer turn ratio are shown in following fig. The primary of each is connected to 230V, 50Hz supply. a. Calculate the DC voltage in each case. b. PIV for each for the same DC output. Assume the diodes to be ideal. Q.4) Attempt any THREE of the following a) Sketch labelled waveform of ECG and EEG. b) Explain the concept of polarization and depolarization of cell with sketch. c) Describe the working principle of linear potentiometer. d) List the specification of air gang capacitor. e) Sketch resistor with colour band of 100Ω resistance with 10% tolerance. Q.5) Attempt any TWO of the following a) Explain the construction of P-N junction diode with sketch. b) Differentiate between photodiode and laser diode. c) Explain the role of engineers in healthcare industry. Q.6) Attempt any TWO of the following a) Explain working of full wave rectifier with sketch. b) List six different medical equipment based on following classifications 1. Analytical 2. Diagnostic c) Explain merits and demerits of following inductors. 1. Air core inductor 2. Ferrite core inductor 3. Iron core inductor 2
SAMPLE QUESTION PAPER - II Marks : 70 Time: 3 Hours Q.1) A) Attempt any FIVE of the following. 10 Marks a) Define passive components. b) List materials of resistors. c) Following capacitors are available a. 10,000 µf electrolytic capacitor b. 100 µf electrolytic capacitor c. Trimmer (range between 10 to 100 µf) d. Trimmer (range between 100 to 10,000 µf) Select value of capacitor to design 20v DC (O/P) power supply. d) Suppose if an inductor is labeled as 223K, find the exact value of inductor. e) Sketch symbol of P-N junction diode. f) Define ripple factor. g) List applications of Tunnel diode and Laser diode. a) Explain the construction of carbon film resistors with sketches. b) Compare variable capacitor with fixed capacitor. 3
c) List materials used for construction of electrolytic capacitor. d) Define following parameters of rectifier a. Ripple Frequency b. PIV of Diode c. TUF d. Efficiency Q.3) Attempt any THREE of the following. a) List out hard and soft magnetic materials. b) Describe different types of magnetic materials and their B-H curve. c) Explain constructional diagram of PIN diode. d) Calculate the voltage across VDC and the current IDC, flowing through a R=100Ω resistor connected to a 240 Vrms single phase half-wave rectifier as shown above. Also calculate the DC power consumed by the load. Q.4) Attempt any THREE of the following. a) Sketch EMG and ERG waveform. b) Describe basic medical instrumentation system with its sketch. c) Explain the construction of wire wound resistors with sketches. d) State the applications of PVC gang capacitor. e) Select passive component for designing of circuit on PCB of size 5mm 5mm to get resistance of 1kΩ between any two points. (For resistive trimmer). Q.5) Attempt any TWO of the following. a) Discuss the applications of IRLED in detail. b) Explain construction of tunnel diode with sketch. c) Describe action potential of the cells Q.6) Attempt any TWO of the following. a) Describe the circuit diagram of half wave rectifier with sketch. b) Give the primary signal characteristics of EMG and ERG. c) Explain re-polarization and depolarization with sketch 4
SAMPLE TEST PAPER I Marks : 20 Time: 1 Hour Q.1) A) Attempt any FOUR of the following. a) List passive components. b) List the materials used for capacitors. d) List the specifications of electrolytic capacitor. e) Distinguish between PVC gang capacitor and trimmer capacitor. f) Classify Resistors. g) Draw constructional diagram of trimmer capacitor. 08 Marks a) Explain the construction of SMD resistors. b) Describe the working principle of logarithmic potentiometer. c) Distinguish between PVC gang capacitor and trimmer capacitor. d) Compare variable capacitor with fixed capacitor. 5
SAMPLE TEST PAPER II Marks : 20 Time: 1 Hour Q.1) A) Attempt any FOUR of the following. a) Draw symbol of Zener and Tunnel diode. b) List the applications of Shottkey diode. c) Define Filters. d) Define TUF and efficiency of rectifier. e) List any four analytical equipments. f) Sketch ECG waveform. 08 Marks a) Describe constructional sketch of PIN diode. b) Compare half wave, full wave bridge and center tap rectifier. c) Discuss the concept of polarization and depolarization with sketch. d) In a centre-tap full wave rectifier, the load resistance R L =1KΩ. Each diode has a forward bias dynamic resistance r f of 10Ω. The voltage across half the secondary winding is 220 sin 314t. Find (i) the peak value of current (ii) the DC or average value of current (iii) the rms value of current (iv) the ripple factor. 6