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BASIC ELECTRICAL ENGINEERING BEE 2nd Sem Diploma Paper PSBTE Exam/ECE/0064/May2011

BASIC ELECTRICAL ENGINEERING 2nd Exam/ECE/6125/2561/0064/Dec 2011

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`BEE DIPLOMA PSBTE MAY 2011 PAPERÂ  Â    `

# Â  Â  Â  Â  1. Fill in the blanks :

1. 100 w bulb operates on 220 V .It draws current 100/220=0.45 A .

2. Filaments of electric bulbs are generally made of Tungsten.

3. The internal resistance of an ideal voltage source is Low.Â Â

4. A passive network is one which contains No sources of emf in it.Â

5. For max, power to transfer, internal resistance of the source should be equal to Load Resistance

6. In constant voltage source output voltage remains same asÂ  Output Current Varies.

7. The unit of resistivity is Ohm per Metre .

8. Copper and silver are Conductive materials.Â

10. Ratio of max value to rms value is known as Peak Factor or Crest Factor.

11. A capacitor block DC Components .

12. In an RLC series circuit, during resonance the will be Impedance Will be Minimum.

13. Q-factor of a circuit is given byÂ  Â QÂ = Æ’r /BWÂ Â  or Q=Resonant Frequency/Bandwidth

14. Inductive reactance XL is given by 2Ï€FL.

15. Steam power plant usesÂ heatÂ energyÂ generated from burningÂ coalÂ to produce electricalÂ energy.Â

## Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  SECTION-B

### Q2. Attempt any five questions.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â 5×6=30

1. State and explain Kirchhoffs Voltage Law.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â
2. State Nortanâ€™ s theorem.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â
3. Discuss ideal current Source ?Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â
4. Define M.M.F ,Reluctance ?Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â
5. Â Explain faradayâ€™s law of electromagnetic induction.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â
6. Explain breifly primary and secondary Cells ?Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â
7. Â What are the causes and disadvantages of poor power Factor ?

## Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â SECTION-C

### Q3. Attempt any three questions.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â 3×10=30

Â  Â  Â  Â  1. Give the advantages and disadvantages of Ni-Cd batteries ?Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â

Â  Â  Â  Â  2. How emf is induced self and mutually emf ?Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â

Â  Â  Â  Â  3. Solve the circuit using Nortanâ€™s theoremÂ  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â 4. Explain with the help of block diagram the steam power plant.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â

Â  Â  Â  Â  Â 5. Find the equivalent resistance of the following network

Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â ORÂ

Â  Â  Â  Â  Â  Define the following, with the help of suitable diagram

• Cycle
• Time period
• Frequency
• Amplitude
• Effective or rms value

## BASIC ELectrICALbEe DEC 2011 DIPLOMA PAPER SOLUTION

Get Started

### Section a FILL IN THE BLANKS BASIC ELectrICALbEe DEC 2011 DIPLOMA PAPER SOLUTION

100 w bulb operates on 220 V .It draws current ______

100 w bulb operates on 220 V .It draws current 100/220=0.45 A .

Â

Filaments of electric bulbs are generally made of ______.

Filaments of electric bulbs are generally made of Tungsten

The internal resistance of an ideal voltage source is _____

The internal resistance of an ideal voltage source is Low

A passive network is one which contains ____ sources of emf in it.

A passive network is one which contains No sources of emf in it.Â

For max, power to transfer, internal resistance of the source should be equal to ______

For max, power to transfer, internal resistance of the source should be equal to Load Resistance

Â

In constant voltage source output voltage remains same asÂ  Output ______ Varies.

In constant voltage source output voltage remains same asÂ  Output Current Varies.

The unit of resistivity is ___________

The unit of resistivity is Ohm per MetreÂ

Â

Copper and silver are _______ materials.Â

Copper and silver are Conductive materials.Â

Â

Ratio of max value to rms value is known as ______

Ratio of max value to rms value is known as Peak Factor or Crest Factor.

Â

A capacitor block _________

A capacitor block DC Components

Â

In an RLC series circuit, during resonance the will be ________ Will be Minimum.

In an RLC series circuit, during resonance the will be Impedance Will be Minimum.

Â

Q-factor of a circuit is given byÂ  ________

Q-factor of a circuit is given byÂ  Â QÂ = Æ’r /BWÂ Â  or Q=Resonant Frequency/Bandwidth

Â

Inductive reactance XL is given by ______

Inductive reactance XL is given by 2Ï€FL.

Â

Steam power plant uses _____________.

Â

Steam power plant usesÂ heatÂ energyÂ generated from burningÂ coalÂ to produce electricalÂ energy.Â

### Section B : BASIC ELectrICAL bEe DEC 2011 DIPLOMA PAPER SOLUTION

State and explain Kirchhoffs Voltage Law.Â  Â

State Kirchhoffs Voltage Law.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â

State Nortanâ€™ s theorem ?

Nortanâ€™ s theorem.Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Â

Discuss ideal current Source ?Â

ideal current SourceÂ  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Â

Â

Define M.M.F ,Reluctance ?Â

M.M.F ,ReluctanceÂ  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â Â

Explain faradayâ€™s law of electromagnetic induction.Â

faradayâ€™s law of electromagnetic induction.Â  Â  Â  Â  Â Â

Explain breifly primary and secondary Cells ?Â  Â  Â  Â  Â  Â  Â  Â  Â  Â

primary and secondary CellsÂ  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â  Â

What are the causes and disadvantages of poor power Factor ?

Causes and disadvantages of poor power FactorÂ