IB Assistant Central Intelligence Officer question part 1

IB Examination 2013 Name of the Examination: Assistant Central Intelligence Officer Grade -II (Technical & Wireless Telegraphy) Examination -2013 Total Marks : 100 Date of Examination : 24/03/2013(March 24, 2013) Question No 1 to 10 (part 1)

Instructions : 1. Each question is followed by four alternatives (i), (ii), (iii) and (iv). Only one alternative is the correct answer, which should be marked by darkening the circle completely with BLUE BALLPOINT PEN only OMR response sheet provided separately. 2. Rough work, if any may be done on the question paper and at all on the OMR response sheet.

1. We need to resistor of value 47 KΩ with ±5 tolerance. The sequence of the color band on this resistor should be i) Yellow, violet,yellow and gold ii) Yellow, violet,orange and gold iii) Yellow, violet,orange and silver iv) Yellow, violet,brown and silver

2. In a practical voltage source, the source resistance is i) Very low compared to load resistance ii) Very high compared to load resistance iii) equal to load resistance iv) Zero

3. In a full wave rectifier the current in each of the diode flows for i) the complete cycle of the input signal ii) half cycle of the input signal iii) less than half cycle of the input signal iv) Zero time

4. We use a crystal oscilltor because i) it gives high output voltage ii) it works at high effciency iii) the frequency of oscillatons remains substantially constant iv) it requires very low dc

5. The output resistance of an ideal amplifier is i) infinite ii) very small iii) Zero iv) very large

6. Harmonic distortion in amplifiers is caused by i) presence of short noise ii) non linearity of active device iii) defective active device iv) due to feedback

7. In bipolar junction transistor, input excitation may be i) a current signal ii) volatage signal iii) both a and b iv) none of these

8. The equivalante dB gain remains unaltered if the power level is increased or decreased by the same factor, i.e. an increase in dB gain when power level changes from 4 to 8 watts is the same as the increase in dB gain whene it would change from 8 to 16 or 16 to 32 watts. The statement is i) true ii) false iii) it may or may not be iv) none of these

9. Current gain of an amplifier in commen Base (CB) configration is i) unity ii) alaways greater than 1 iii) alaways less than 1 iv) all of these

10. Configration used to connect a high impdance source to a low impedance load is i) Common Emitter (CE) ii) Common Collector(CC) iii) Common Base (CB) iv) all of these

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