I. Pick the right answer from the options given below: 1. Electron was invented by a. JJ Thomson b. Faraday c. Kirchhoff’s d. Dr William Gilbert
2. Which of the following is the SI unit of charge a. Coulomb b. Ampere c. Watt d. Ohms
3. The current flowing through a resistance of 2Ω, when a potential of 10V applied is? a. 5A b. 5mA c. 0.5A d. 0.5mA
4. Color code of 220Ω resistor is a. Orange, Orange, Red b. Red, Red, Red c. Red, Red, Brown d. Red, Red, Orange
5. Capacitance of capacitor depends on which of the following parameters a. Distance between the plates b. Permittivity of the medium c. Area of the conductor d. All of the above
6. The Inductor doesn’t allow sudden changes in a. Voltage b. Current c. Resistance d. Inductance
7. Among these which is NOT a transducer? a. Loud Speaker b. Microphone c. Camera d. Capacitor
8. Which among the following statements are true w.r.t. Inductor? Statement I: In the case of inductors reactance is directly proportional to frequency. Statement II: For DC inductors acts as a short circuit
a. Both I and II are false b. Both I and II are true c. Only statement I is true d. Only statement II is true
9. For what value of Φ Average power of an AC signal in an LCR circuit will be zero a. 0 degree b. 45 degrees c. 90 degrees d. 180 degrees
10.The output voltage of IC 7812 is a. +12 V b. -12V c. +9V d. -9V
11.Semiconductor Diodes are used in rectifiers because. a. Unidirectional device b. Zero On state resistance c. It’s a semiconductor device d. None of the above.
12.Which of the following terminals of BJT are lightly doped? a. Base b. Collector c. Emitter d. None of the above.
13.In which of the following region do BJT operates as closed switch. a. Active b. Cut-off c. Saturation d. Both a and c
14. 15(10)=_______ (2) a. 1011 b. 1111 c. 1010 d. 1110
15.In which logic gate output is HIGH if one of the inputs is LOW? a. AND b. OR c. NOR d. NAND
II. Fill in the blanks with choices given in the brackets. 5 x 1= 05 (Pulse oximeter, LOW, 0.7V, Zero, ONE, ECG) 16. Value of internal resistance of an ideal voltage source __________ 17. __________ is the instrument used to measure oxygen content in blood. 18. Value of permittivity of AIR is ________ 19. _____ is the value of barrier potential of silicon semiconductor Diode 20. In the logic circuit given below If the input A=1, B=0, output will be ________.
III. Answer any Five questions: 21. Draw the V-I characteristics of a practical voltage source. 22. Find the resistance between A and B. 23. Mention two control knobs of a CRO and write its uses. 24. Distinguish between active and passive components. 25. List the factors on which self-inductance of a coil depend. 26. What is capacitive reactance and give the expression for the capacitive reactance. 27. Write the circuit of positive clamper and show the input and output waveforms. 28. Find the Binary equivalent of (DADF)16? 29. List any four advantages of data sheet.
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