beee question

8/6/2019 Beee Question

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Unit-I

1. What is meant by power factor?2. Find the effective value of the cosine wave V m (wt+ ).3. Define RMS value4. Define ohms law5. State the principle of moving iron instrument.6. Distinguish between a mesh and a loop of a circuit.7. What is amplitude factor?8. Three resistors of equal resistances are connected in parallel across a 20V dc source. If the current

through one of the resistors is 2A. What is the value of equivalent resistance of the parallelconnected resistors?

9. Give the advantage of three phase system.10. list the measuring instrument you known

1. Explain the working principle of dynamometer type wattmeter.2. With neat diagram explain the operating principle of attraction type and repulsion type MI

instrument.3. Explain the principle and operation of PMMC instruments. How ammeter and voltmeter can be

constructed using PMMC4. Derive an expression for RMS value of an AC supply.5. A capacitance of 20 and an inductance of 0.2H and a capacitance of 100F are connected in

series across 220V, 50HZ MAIN. (i) Impedance (ii) current taken from mains (iii) power and power factor of the circuit.

6. Determine the value of current through the branch DC of the network the branches DC of the

network shown below in figure. When the current through the branch BD is zero.


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Unit-II

1. Define Back emf.2. Why the single phase induction motor is not self starting.3. Give the importance of a commutator in a DC machine.4. What is a function of transformer 5. Write the emf equation of a DC generator.6. Draw the speed torque characteristics of series and shunt motors.7. Why is a shunt motor called constant speed drive?8. Write the voltage equation of a motor 9. WRITE the emf equation of two winding transformer.10. Why a 1 induction motor is not self-starting?

1. Explain the construction and working of a DC motor with necessary sketches.

2. Derive the emf equation of a DC generator.3. With necessary diagram explain the working principle of transformer and obtain its Emf equation.4. (i) Explain the working principle of single phase induction motor?

(ii) A single phase transformer has 400 primary and 1000 secondary turns. The net crosssectional area of the core is 60 cm 2. If the primary winding be connected to a 50HZ supply at520V, calculate (A) the peak value of flux density in the core.

5. (i) derive an expression for the torque developed in DC motor (ii) A four pole generator having wave wound armature winding has 51 slots containing 20conductors .what will be the voltage generated in the machine when driven at 1500 rpm.

Assuming the flux per pole to be 7.0 mwb6. Describe the construction and working of a shaded pole motor.


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UNIT-III

1. What is transport factor of a CE amplifier?2. Give the circuit symbol of a PNP and a NPN.3. Sketch a bridge rectifier circuit4. Draw the VI characteristics of a zener diode.5. What is a voltage regulator?6. What is a semiconductor? Give example7. What is the effect of doping?8. What do you mean by zener breakdown?9. List a few biasing techniques for transistor 10. Distinguish between intrinsic and extrinsic semiconductor?

1. (i)Explain the operation and VI characteristics of a BJT in common emitter configuration.

(ii)Discuss briefly about the small signal amplifier.

2. Explain the principle and operation of a half wave rectifier.3. Explain the operation of zener diode and how it is used for voltage regulation4. Explain the action of the full wave bridge rectifier .Give waveform of input and output

voltage. Also derive the output voltage,ripple factor, efficiency and voltage regulation5. Draw the common base mode of a BJT. Discuss its operation with necessary sketches.

6. Define the term biasing. With neat sketch explain the VI characteristics of PN junctiondiode


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Unit- v

1. Define the term modulation2. What is need for carrier signals in modulation?3. What is the frequency of the carrier signals of radio and TV?

4. Define frequency modulation and draw the frequency modulated wave.5. Compare analog and digital signals6. Draw the block diagram of a satellite communication.7. How is optical fiber useful in modern day communication?8.

1. Explain the principle of amplitude and frequency modulation

2. (i) With help of a neat diagram explain the basic components of satellite communication.(ii) Explain the operation of a FAX machine.

3. Explain the operation of a microwave communication?4. Draw the block diagram of radio transmission and receiving system and explain each block.5. Write a detailed note on optical fibre communication6. Draw and explain the function of block diagram of monochrome TV transmitter and receiver.


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beee question

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