## BASIC ELECTRICAL ENGINEERING

2nd Sem/ECE/6125/2561/0064/Dec 2011

**Basic Electrical Engineering BEE Dec 2011 PaperÂ Â Â **

### Duration : 3 HrsÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â M.Marks : 75Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â **SECTION A**

**Â Â Â Â 1. Fill in the blanks :**

- The unit of magnetic flux density isÂ
**Weber per Square metre** - If â€˜nâ€™ identical resistances are connected in series, their total value is K? when these are connected in parallel their effective value isÂ
**K/n** - The resistance of a wire is 2?. If the diameter of wire is reduced to half, keeping the length same, then the resistance will be
__Â Â Â Â Â Â Â Â__. - The power factor of an A.C. circuit is equal to
**Real Power/Apparent Power.** - Frequency ofÂ DC voltage is
**Zero**. - The unit of coefficient of coupling is
**No unit or UnitlessÂ** - The unit of magnetic flux density is
**Weber per Square metre.**Â - For battery charging supply is
**DC Supply.** - If 18 resistances, each of 36W are connected in parallel, then effective resistive will be
- The power drawn by pure inductance is
**ZeroÂ**

## Â Â 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 Â Â Â Â 5×6=30**

- Give the merits and demerits of nuclear power plant ?.
- Define self and mutually induced emfs ?
- Draw and explain Phasor diagram for the R-L series Circuit ?.
- Explain hysteresis Loss ?.
- What is constant current source and draw characteristics of an ideal current
- A resistor of 100 W is connected in series with a 56 mF capacitor to a supply at 230 V, 50 Hz. Find the impedance, the current, the phase angle, the pf and the voltage across the resistor and the Capacitor ?
- What do you mean by form factor and peak factor ?

## Â Â Â 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 Â Â Â Â Â Â Â Â Â Â Â Â 3×10=30**

**Â Â Â Â 1. **Find the impedance, current and the power factor of the following series circuitsÂ and draw the corresponding phasor diagramÂ Â (a) R and LÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (b) R and CÂ In each case the applied voltage is 200 volt, the frequency is 50 Hz, R = 10 ohm,Â Â Â L = 50 mH; C = 100 pF.

Â Â Â Â 2. (a) What are the various precautions to be observed for obtaining longer life and batter efficiency of lead acid battery ?Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â (b) Define flux, mmf, reluctance and permeability in magnetic circuits.

Â Â Â Â 3.(a) Compare electric and magnetic What do you mean by power factor ? What is its importance.

Â Â Â Â Â (b) Discuss hydro power plant with the help of schematic Diagram ?Â Â

Â

## BASIC ELectrical engineering bee dec 2011 DIPLOMA PAPER SOLUTION

### Section a FILL IN THE BLANKS bee dec 2011paper

The unit of magnetic flux density isÂ ________.

The unit of magnetic flux density isÂ Weber per Square metre

If â€˜nâ€™ identical resistances are connected in series, their total value is K? when these are connected in parallel their effective value isÂ **K/n**

The resistance of a wire is 2?. If the diameter of wire is reduced to half, keeping the length same, then the resistance will be __Â Â Â Â Â __.

The power factor of an A.C. circuit is equal to ________.

The power factor of an A.C. circuit is equal to **Real Power/Apparent Power.**

Frequency ofÂ DC voltage is ___

Frequency ofÂ DC voltage is **Zero** .

The unit of coefficient of coupling is _____

The unit of coefficient of coupling is No unit or UnitlessÂ

The unit of magnetic flux density is ______.

The unit of magnetic flux density is Weber per Square metre.Â

For battery charging supply is ________.

For battery charging supply is DC Supply.

If 18 resistances, each of 36W are connected in parallel, then effective resistive will be ____

If 18 resistances, each of 36W are connected in parallel, then effective resistive will be 9 Ohm

The power drawn by pure inductance is _____.

The power drawn by pure inductance is ZeroÂ

Â

#### Basic Electrical Engineering Diploma Solved Paper Dec 2011 Question Paper Solution Click Here

### Section B : BEE PAPER DEC 2011 PAPER

Give the merits and demerits of nuclear power plant ?

merits and demerits of nuclear power plant

Â

Define self and mutually induced emfs ?

Self and mutually induced emfsÂ

Draw and explain Phasor diagram for the R-L series Circuit ?

Explain Phasor diagram for the R-L series CircuitÂ

What is constant current source and draw characteristics of an ideal current Source.

Constant current source

Draw characteristics of an ideal current Source.

A resistor of 100 W is connected in series with a 56 mF capacitor to a supply at 230 V, 50 Hz. Find the impedance, the current, the phase angle, the pf and the voltage across the resistor and the Capacitor ?

What do you mean by form factor and peak factor ?

#### Basic Electrical Engineering PSBTE Diploma Solved Paper Dec 2011 Solution Click Here

## BASIC ELECTRONICS DIPLOMA MAY 2019 SUBJECT CODE 0664 PAPER

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### Section c solved bee paper MAY 2019

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Precautions to be observed for obtaining longer life and batter efficiency of lead acid batteryÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â

(b) Define flux, mmf, reluctance and permeability in magnetic circuits.

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3.(a) Compare electric and magnetic What do you mean by power factor ? What is its importance.

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(b) Discuss hydro power plant with the help of schematic Diagram ?Â

Hydro power plant with the help of schematic DiagramÂ

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