## Number of PN Junctions on BJT are

Electrical Engineering XYZ MCQ on BJT. Number of PN Junctions on BJT are: Correct answer: 2. Two Also see: BJT Handbook Explanation of MCQ The BJT is constructed with three doped semiconductor regions separated by two pn junctions. The three regions are called emitter, base, and collector. The figure below depicts npn type of BJT … Read more

## Current and Power Basic Electrical Engineering Formula Sheet Chart for kW, kVA, HP, Amps Formulas Calculations

Basic Electrical Formulas Chart Subscribe our Youtube channel here for more Receive future updates via Telegram here Basic Electrical Formulas chart enables you to calculate kW, kVA, HP, and Amps in DC, Single Phase AC, Two Phase Four Wire AC and Three Phase AC Circuits. You can use the chart for: Also see:

The “Basics of Industrial Instrumentation Handbook” by Electrical Engineering XYZ is a comprehensive guide tailored for professionals, students, and enthusiasts in the field of industrial instrumentation. This useful handbook offers a wealth of knowledge, covering fundamental concepts and practical applications in industrial measurement and control systems. Readers will find in-depth discussions on sensors, transducers, control … Read more

## Why longer cross arms improve String Efficiency

The value of string efficiency depends upon the value of K. Where K is defined as the ratio of shunt capacitance to mutual capacitance. The lesser the value of K is, the greater is the string efficiency and more uniform is the voltage distribution. K can be decreased by reducing the shunt capacitance. In order … Read more

## What is Impact of Lightning Strike on Transmission Lines

The impact of lightning strike on transmission lines is to create a surge that runs across the line. In most cases, such surge can cause line insulators to flashover and can cause damage to nearby generators, transformers or other equipment connected to line in case of absence of proper protection system. Also see: Electrical Safety … Read more

## The value of plant capacity factor is – Electrical Engineering XYZ MCQs

Electrical Engineering MCQ on Power Generation and Power Plant Engineering. The value of plant capacity factor is Correct answer: 3. Less than 1 Explanation: Plant capacity factor is defined as the ratio of average power to the plant capacity. Pcf = Average power/Plant capacity The average power output of a plant is less than the … Read more

## Which of the following factor decides the insulation level of 400 kV, EHV line – Electrical Engineering XYZ MCQs

Electrical Engineering XYZ MCQ on Power Transmission lines Which of the following factor decides the insulation level of 400 kV, EHV line: Correct answer: 4. Switching over voltage Explanation: In case of transmission line voltages up to 230 kV the insulation level is decided by the requirement of protection against lightning. In case of EHV, … Read more

## Effect of capacitance is negligible in case of – Electrical Engineering XYZ MCQs

Electrical Engineering XYZ MCQ on Power Transmission lines Effect of capacitance is negligible in case of: Correct answer: 1. Short transmission lines Also see: The lines below what length are considered short transmission lines Explanation: Capacitance becomes negligible in the case of short transmission lines. In a transmission line, capacitance is one of the three … Read more

## The total diameter of a three-layer ACSR conductor is 5 cm. The diameter of each strand will be

Electrical Engineering MCQ on Power Transmission The total diameter of a three-layer ACSR conductor is 5 cm. The diameter of each strand will be Correct answer: 1. 1 cm Explanation: Mathematical formula for total diameter of an ACSR conductor D = (2x-1)*d Where in above equation Therefore, 5 = (2*3-1)*d d = 1 cm

## Why Insulators have negative temperature coefficient of resistance

The temperature coefficient of resistance (TCR) is a measure of how much an electrical resistance of material changes with temperature. The temperature coefficient can be positive, negative, or zero. A negative temperature coefficient of resistance (NTC) means that the resistance of the material decreases as the temperature increases. In other words, as the temperature rises, … Read more