BHARAT SEVAK SAMAJ
Time: 2hrs. Max. Marks: 100
I. Fill in the blanks: (10 x 1 = 10)
1. Power dissipation in a resistive load would be .
2. In resistance colour code the Gold band indicates a tolerance of ..
3. Rectification efficiency of Fullwave bridge rectifier is .
4. Unit of Inductor is
5. When two capacitors C1 and C2 are connected in parallel total capacitance is . ..
6. Diode is an electronic circuit is used for ..
7. Solder wire is an alloy of .
8. Majority carrier in N type semiconductor are
9. Alpha of a transistor is always ..
10. The process of making DC from AC is known as ..
II. State whether True or False: (10 x 1 = 10)
1. The colour system of TV used in India is SECAM.
2. In pure inductive load current lags voltage by 90 0
3. Zener uses reverse voltage.
4. Semiconductor in its purest form is called extrinsic semiconductor.
5. A practical current source has low internal resistance
6. The mutual conductance of a pentrode tube is of the same order as that of a triode.
7. The space charge formed around the cathode of a vacuum tube is negative.
8. An ideal current source has low internal resistance.
9. The IF of AM is 455 KHz.
10. Tuned voltage amplifiers are not used in public-address system.
III. Answer any SIX of the following: (6 x 10 = 60)
1. Explain Paper Capacitor and Ceramic Capacitor.
2. Explain the colour coding of a resistor.
3. Explain electrolytic capacitors and Variable capacitors.
4. Explain the working of a single tuned amplifier.
5. What is a capacitor? Explain the colour coding of a Capacitor.
6. What are the different types of transistors? Explain.
7. Explain Average value, RMS value and Phase.
IV. Answer any ONE of the following: (1 x 20 = 20)
1. Explain single tuned voltage amplifier.
2. What is an emitter follower? What is its important application?