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Explain the working principle of a single-phase transformer.
Current division rule example PGCIL DT Electrical Determine the voltage drop across the 8 Ω resistor
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Describe the principle of electric arc welding.
Superposition Theorem | Electric Circuits | Problem 4.9 | Electrical Engineering
Compare the working principles of a hydroelectric power plant and a nuclear power plant.
How to create a sales strategy ? | Electrical Engineering
Explain the principle of operation of a DC motor.
Complex Number | Electrical Engineering
What is Orthographic Projection, and what is the fundamental principle that governs the alignment of the standard views (Front, Top, and Right Side) on a 2D engineering drawing? Answer : **Orthographic Projection** is the primary method used in engineering to represent a three-dimensional object on a two-dimensional surface. The core idea is to look at the object from ... the exact 3D object it represents, making it the unambiguous foundation for manufacturing and construction....
Digital Multimeter (DMM) | Electrical and Electronics Engineering | Electrical Engineering
Describe the function of an inverter in a power electronics system.
How to solve supernode in nodal analysis ? | Electrical Engineering
Describe the main components and energy conversion stages of a thermal power plant.
Single Phase Parallel AC Circuit | Parallel Impedance, Current, and Power Factor Analysis
How does a digital multimeter measure voltage, and what is its basic working principle?
Mesh analysis 12 | Electrical Engineering
In C++, what is the fundamental problem that the virtual keyword solves when working with inheritance and pointers, and what is the practical difference in behavior when a base class function is declared with versus without it? Answer : The `virtual` keyword solves the critical problem of **static vs. dynamic binding**, enabling **runtime polymorphism**, which is arguably the most powerful feature of Object-Oriented Programming. In simple terms, `virtual` ... NOTE: No 'virtual' keyword here void draw() { std::cout ...
If v1 = -10 sin(wt — 30°) V and v2 = 20 cos(wt + 45°) V, find v = v1 + v2. | Electrical Engineering
What is the basic principle behind how a RADAR system detects an object's range and velocity?
Find unknown impedance Z in the network of fig. | Impedance and Admittance | Hard Problem
Explain the principle of Pulse Width Modulation (PWM) for controlling motor speed.
Admittance (Y)
Describe an experiment to determine the acceleration due to gravity (g) using a simple pendulum.
Alternating Voltage | Electrical Engineering
Describe the properties of copper that make it an ideal material for electrical wiring.
How 0.636 come in average value of alternating current | Electrical Engineering
Describe the role of an Analog-to-Digital Converter (ADC) in an embedded system that measures temperature.
Voltage Divider Rule | Electrical Engineering
Describe the practical application of Pascal's law in hydraulic systems.
Wye Delta Transformation 6 | Electrical Engineering
Describe with sketches the process of laying of underground cables by the drawing in method. Answer : ### **The "Drawing In" Method for Laying Underground Cables** This method involves first installing a system of pipes or conduits (called ducts) underground. The cables are then pulled, or " ... duct system. However, this is often offset by the long-term flexibility and protection it provides....
TRIAC | Electrical Engineering
Describe with reasons the failure of porcelain insulators. Answer : ### **Introduction: The Role of Porcelain Insulators** Porcelain insulators are a critical component in electrical power systems. Their primary functions are twofold: 1. **Electrical Insulation: ... , and maintenance strategies (like insulator washing) to ensure the reliability of the power grid....
Autotransformer MCQ | Electrical Engineering
What does a wattmeter measure? Answer : ### In Simple Terms A wattmeter measures **electrical power**. Think of it like this: * **Voltage** (measured by a voltmeter) is like the *pressure* of water in a pipe. * **Current** (measured ... potential or "pressure." | | **Ammeter** | Amps (A) | Measures electrical current or "flow." |...
Resonance in Series Circuit Example: Calculating Capacitance, Voltage, and Q-Factor
What is the function of a capacitor in an electronic circuit? Answer : To store electric energy when the circuit is closed and release the energy when circuit is opened ...
Electrical Engineering Facts 9
Define the transfer function of a linear time-invariant (LTI) system.
Electrical Engineering | Electrical Machine | DC motor | MCQ 1 | Electrical Engineering
What is the role of a FACTS device like a STATCOM in a power transmission system?
Evaluate int1(2x-x^2)dx | Electrical Engineering
What are the main components of a battery electric vehicle (BEV) powertrain?
Octal to Binary Conversion | Electrical and Electronics Engineering | Electrical Engineering
Compare and contrast the operational characteristics of a MOSFET and an IGBT.
Linear Algebra Problem 2 | Electrical Engineering
Explain the basic components and architecture of a SCADA system.
Nodal Analysis Solved Example | Electrical Engineering
What is the primary function of a circuit breaker in an electrical system? Answer : It Cuts the power off in any fault in the circuit such as overloading to protect appliances....
mesh analysis basic electrical engineering | Electrical Engineering
What is the function of the Arithmetic Logic Unit (ALU) in a microprocessor?
What is the frequency of single phase AC power in most regions | Electrical Engineering
What is the purpose of a substation in an electrical power grid?
Convert 90 degrees to radians. | Electrical Engineering
Explain the concept of inheritance in C++ with a simple example.
Write equation of resultant impedance in R-L circuit. | Electrical Engineering
What are the properties of silicon that make it a suitable material for semiconductors?
Current Division Rule Example with 3 Resistors in Parallel | Electrical Engineering
How can the Internet of Things (IoT) be used to create a smart home automation system?
Phasor Representation of Sinusoidal Quantities | Electrical Engineering
Explain the operation of a buck-boost converter and its primary application.
MCQ on Power Generation | Electrical Engineering
What factors should be considered when estimating the cost of wiring a new residential building?
Open Circuit , Close Circuit and Short Circuit
What is the function of a rectifier in a power supply?
transmission and distribution mcq | Electrical Engineering
Calculate the equivalent resistance of a circuit with three resistors (5Ω, 10Ω, 15Ω) connected in parallel.
independent current source
Why is the Fourier Series—the ability to represent a complex periodic function as a sum of simple sine and cosine waves—considered one of the most powerful tools in applied mathematics and engineering? Answer : The power of the Fourier Series lies in its ability to transform a problem from the often-complex **time domain** into the much simpler and more intuitive **frequency domain**. It acts like a ... ) is impossible. The sharp corners, which rely on the highest frequencies, will always get rounded off....
Electrical Engineering MCQ | Electrical Engineering
In a Hall Effect experiment, a voltage is measured perpendicular to both the current flow and the magnetic field. What is the physical origin of this "Hall Voltage," and what two crucial properties of a semiconductor material can be determined by measuring it? Answer : The physical origin of the Hall Voltage is the **Lorentz force** acting on charge carriers as they move through a magnetic field. This simple experiment is profoundly important because it ... **carrier concentration `n`**, a fundamental parameter that dictates the material's electrical properties....
special features of isolation transformer | Electrical Engineering
What is the multipath fading problem in wireless communication, and how does the Orthogonal Frequency-Division Multiplexing (OFDM) modulation scheme elegantly solve this problem, which was a major limitation for previous generations of mobile technology? Answer : This question addresses the single most challenging physical problem in mobile communication and the ingenious solution that underpins virtually all modern broadband wireless standards. --- ### **Part 1: The Problem - Multipath Fading and ... **4G LTE, 5G NR, and modern Wi-Fi (Wi-Fi 4/5/6/7)**....
For Series RC circuit find resistance and capacitance using v and i expressions
Why are microwave frequencies overwhelmingly preferred for radar systems, and what fundamental trade-off does the choice of a specific microwave frequency (e.g., S-band vs. X-band) represent for a radar's performance? Answer : The use of microwaves is not arbitrary; they occupy a "sweet spot" in the electromagnetic spectrum that provides the best balance of physical properties for detecting and ranging objects. ... provides the required resolution for the mission, thereby maximizing its all-weather performance and range....
Nodal Analysis : Calculate the node voltages in the circuit shown in Fig | Electrical Engineering
Why is accurately estimating Indirect Costs (Overhead) and Profit just as critical as correctly calculating the direct costs of labor and material when submitting a competitive and sustainable electrical bid? Answer : This question gets to the heart of what separates a working electrician from a successful electrical contractor. While getting the direct costs right determines the *cost* of a job, getting ... reward the risk involved. All three are indispensable pillars of a successful electrical contracting bid....
Electrical Engineering Video Tutorials App | Electrical Engineering
What is the difference between a fundamental quantity and a derived quantity? Provide two examples of each. Answer : ### The Core Difference In simple terms, **fundamental quantities** are the basic building blocks of measurement. They are independent of each other and cannot be expressed in terms of other physical quantities. Think of them as the ... ** ($m^2$), **Speed** (m/s), **Force** (Newton or kg·m/s²) |...
Electric current | Conventional Current vs. Electron Flow | Electrical Engineering
Explain the choice of size and number of generator units in a power plant. Answer : --- ### The Fundamental Trade-Off At its core, the decision boils down to a trade-off between two main approaches: 1. **A Few Large Units:** This approach leverages **economies ... designed with multiple, fast-ramping units to complement the variability of wind and solar power on the grid....
Step by Step Norton's Theorem Solved Example Problem | Norton's Equivalent Circuit
A steady current flow in a metallic conductor of non-uniform crosssection. Which of these quantities is constant along the conductor: current, current density, electric field, drift speed? Answer : Here is a detailed explanation for each quantity: ### 1. Current (I) * **Why it's constant:** The term "steady current" implies that the rate of flow of charge ($I = dQ/dt$) is constant. Due to the ... ($v_d$)** | Not Constant | $v_d = I/(nAe)$. Since A is not constant, $v_d$ is not constant. |...
Phasors Problem | Sinusoids Example | AC circuit | Electrical Engineering
Six lead-acid type of secondary cells each of emf 2.0 V and internal resistance 0.015 Ohm are joined in series to provide a supply to a resistance of 8.5 Ohm . What is the current drawn from the supply and its terminal voltage? Answer : ### Given Data: * Number of cells, **n = 6** * EMF of each cell, **E_cell = 2.0 V** * Internal resistance of each cell, **r_cell = 0.015 Ω** * External resistance (load), **R = 8.5 Ω ... The current drawn from the supply is **1.40 A**. * The terminal voltage of the supply is **11.9 V**....
Phasors Complex Number Rectangular form to Polar form and Polar form to Rectangular form AC circuits
A storage battery of emf 8.0 V and internal resistance 0.5 Ohm is being charged by a 120 V DC supply using a series resistor of 15.5 Ohm . What is the terminal voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit? Answer : ### Given Data: * Electromotive force (emf) of the battery, $E = 8.0 \text{ V}$ * Internal resistance of the battery, $r = 0.5 \text{ } \Omega$ * DC supply voltage, $V_{supply} = ... to a much safer and more manageable **7.0 A**, protecting both the battery and the power supply from damage....
Nodal Analysis Problem | Electrical Engineering
A silver wire has a resistance of 2.1 Ohm at 27.5 degree C , and a resistance of 2.7 Ohm at 100 degree C . Determine the temperature coefficient of resistivity of silver. Answer : ### 1. Understand the Principle The relationship between resistance and temperature for most metals (like silver) over a moderate temperature range is approximately linear and can be described by the formula: $R_2 = ... 00394 °C⁻¹** Alternatively, in scientific notation: **α = 3.94 x 10⁻³ °C⁻¹**...
Logic Gates Explained | Digital Electronics | Electrical Engineering
A battery of emf 10 V and internal resistance 3 Ohm is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed? Answer : ### Given Information: * **EMF of the battery (E):** 10 V * **Internal resistance (r):** 3 Ω * **Current in the circuit (I):** 0.5 A --- ### 1. What is the resistance of the ... text{V}$ Both methods give the same result. **Answer:** The terminal voltage of the battery is **8.5 V**....
Comparison between AC and DC | Electrical Engineering
Three identical cells, each of emf. 2V and unknown internal resistance are connected in parallel. This combination is connected to a 5 ohm resistor. If the terminal voltage across the cell is 1.5 volt. What is the internal resistance of each cell? Hence define the internal resistance of a cell? Answer : ### Part 1: Calculating the Internal Resistance Here's how we can find the internal resistance of each cell. **Given Data:** * Electromotive force (EMF) of each cell, E = 2 V * Number of identical cells ... . * **I** is the current flowing from the cell. * **r** is the internal resistance....
Transformer | Electrical Engineering
A battery of emf E and internal resistance r sends a current, I1 , I2 when connected to an external resistance of R1 , R2 respectively. Find the emf. and internal resistance of the battery. Answer : Let's derive the expressions for the electromotive force (EMF) and the internal resistance of the battery step-by-step. ### Understanding the Setup The core principle we'll use is Ohm's law applied to the entire circuit. For a ... $$ **EMF (E):** $$ E = \frac{I_1 I_2 (R_1 - R_2)}{I_2 - I_1} $$...
How to convert Phasors to Sinusoids | Example 9.5 | Electrical Engineering
Explain with the help of a circuit diagram, how the value of an unknown resistance can be determined using a Wheatstone bridge? Answer : ![][1] [1]: https://electrical-engineering.app/?qa=blob&qa_blobid=407323477172242274 ### **Introduction** A Wheatstone bridge is an electrical circuit used for the precise measurement of an ... (R₃) at the balance point has been recorded, the unknown resistance Rₓ can be calculated precisely....
Mesh Analysis Problems | 18 Solved Examples on Circuit Analysis by Mesh Current Method Basic problem
Why do we prefer a potentiometer to measure the emf of a cell rather than a voltmeter? Answer : The primary reason we prefer a potentiometer to measure the EMF of a cell is that **a potentiometer draws no current from the cell at the point of measurement.** A voltmeter, by its ... method ensures no current is drawn, thereby eliminating any error caused by the source's internal resistance....
The History and Science of Chocolate: From Aztec Bitter Beverage to Modern Treat
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