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Explain the principle of Pulse Width Modulation (PWM) for controlling motor speed.
Linear algebra problem: Rank of a matrix | Electrical Engineering
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Explain the operation of a buck-boost converter and its primary application.
Alternating Current , Waveform , Instantaneous value
Explain the working principle of a single-phase transformer.
Nodal Analysis Example | Electrical Engineering
Why can a DC motor run on a DC supply, but a transformer will be damaged if connected to the same DC supply? Answer : The reason lies in their fundamentally different operating principles: **Back EMF** in a DC motor versus **Mutual Induction** in a transformer. **1. The DC Motor: Operation via Back EMF** A ... from an AC supply and has no internal mechanism to limit a DC current, leading to its rapid destruction....
Hard Work vs Smart Work | Electrical Engineering
Explain the concept of 'slip' in an induction motor.
Thevenin's and Norton's Theorems 5 | Electrical Engineering
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....
Mesh Analysis | Electric Circuits | Problem 3.48 | Electrical Engineering
Describe the working principle of a permanent magnet moving-coil (PMMC) instrument.
Nodal Analysis Example 3 | 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....
Bandwidth of a Series Resonant Circuit | Electrical Engineering
Explain the basic components and architecture of a SCADA system.
Phasor Representation of Sinusoidal Quantities | Electrical Engineering
Explain the concept of inheritance in C++ with a simple example.
Silicon-Controlled Rectifier (SCR) | 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....
Phasors | Sinusoidal Addition Solved Example Problem | 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....
Design of IIR filter using Bilinear transformation 2 | Electrical and Electronics Engineering
What is the basic principle behind how a RADAR system detects an object's range and velocity?
Rectangular form to polar form example 1 | Electrical Engineering
Describe the principle of electric arc welding.
MCQ on self and mutual inductance | Electrical Engineering
Explain Newton's second law of motion and provide a real-world example.
Single Phase Induction Motors MCQ | Electrical Engineering
Explain the difference between a conductor, an insulator, and a semiconductor based on their energy band structure.
mesh analysis problems 3 loops | Electrical Engineering
State Maxwell's equations and briefly explain the physical significance of one of them.
Superposition Theorem | Electric Circuits | Problem 4.11 | Electrical Engineering
Explain the process of photosynthesis in plants.
Why noise of motor is produced? How it can be reduced? | Electrical Engineering
Explain the concept of following terms : (i) Connected load (ii) Maximum demand Answer : --- ### (i) Connected Load #### Definition **Connected Load** is the sum of the power ratings (in Watts or Kilowatts) of all electrical appliances and equipment installed in a consumer's ... infrastructure (wires, breakers). | **Billing & Grid Management** (demand charges, capacity planning). |...
Permanent Magnet DC PMDC Motor MCQs | Electrical Engineering
Explain the reasons for failure of gaseous and solid dielectric materials used in electrical engineering application. Answer : ### **Introduction to Dielectric Failure** A dielectric material is an electrical insulator that can be polarized by an applied electric field. Its primary function in electrical engineering is to ... Often a slow, aging-related process - Highly sensitive to impurities, voids, and moisture |...
Express 5^3 = 125 in logarithm form. | Electrical Engineering
Explain the phenomenon of loss of magnetism. Answer : ### The Short Answer Loss of magnetism, also known as **demagnetization**, is the process where a magnetic material loses its magnetic properties. This happens when the microscopic "mini-magnets" inside the material, ... 's own stray field. | A structure slowly eroding due to wind and rain. |...
Thevenin's Theorem Statement and Solved Example | Thevenin's Equivalent Circuit Explained
Explain the use of the following components in electrical wiring system and give specification of each: (i) MCB (ii) ELCB Answer : ### Introduction In any modern electrical wiring system, safety and protection are paramount. Devices like MCBs and ELCBs are critical safety components installed in a consumer unit (also known as a ... (lighting, sockets, etc.) | Protecting a group of circuits or an entire installation |...
Thevenin's and Norton's Theorems 11 | Electrical Engineering
Explain the uses of safety rubber hand gloves and rubber mats in electrical engineering. Answer : In electrical engineering, safety is paramount. Two of the most fundamental and critical pieces of Personal Protective Equipment (PPE) are **safety rubber hand gloves** and **insulating rubber ... environment and preventing a worker's body from becoming the path of least resistance for electricity....
Dynamically induced emf | Electrical Engineering
Explain the use of following tools in carrying out electrical wiring installation: (i) Nose pliers (ii) Test lamps (iii) Crimping tools (iv) Cutter. Answer : General Introduction In electrical wiring, using the correct tool for the job is not just about efficiency; it is a fundamental requirement for safety and the quality of the finished installation. A poor ... Do not use them to cut steel wire or screws, as this will damage the cutting edges....
Source Transformation | Electric Circuits | Problem 4.23 | Electrical Engineering
Explain the process and need of crimping of cable joints. Answer : ### Introduction: What is Crimping? At its core, **crimping** is a process used to join a wire (conductor) to a metal terminal or connector (like a lug, spade, or pin). It involves ... is identical and reliable. | A ratcheting tool ensures the same, correct pressure is applied every single time. |...
RLC series circuit | CIRCUIT WITH RESISTANCE, INDUCTANCE AND CAPACITANCE IN SERIES
Explain the electrical and thermal properties of transformer oil those make it suitable as an electrical insulating medium. Answer : ### Introduction: The Dual Role of Transformer Oil Transformer oil, also known as insulating oil, is a highly refined oil that is stable at high temperatures and has excellent ... characteristics are maintained by robust thermal properties over the entire operating life of the transformer....
Nodal Analysis | Node Analysis Example | Electric Circuits and Networks | Electrical Engineering
Explain the suitability of copper as an electrical conductor with reference to its mechanical and electrical properties. Answer : ### Introduction Copper is the industry standard for electrical wiring and conductors, and its widespread use is due to an exceptional combination of both electrical and mechanical properties. While ... for decades, making it the superior choice for the vast majority of electrical applications....
Basic Electrical MCQ | 10 | Electrical Engineering
State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line Answer : ### 1. Significance of Earthing Earthing (or grounding) is a fundamental safety measure in any electrical installation. Its primary significance is to protect people, equipment, and property from ... to consumers. [1]: https://electrical-engineering.app/?qa=blob&qa_blobid=3390146307772186646...
Types of capacitors
Draw and explain the use of : (i) Combination plier (ii) Tester (iii) Wire Striper (iv) Hammer Answer : Cutter cum Insulation Remover : ![][1] [1]: https://electrical-engineering.app/?qa=blob&qa_blobid=7558183951160707100...
Derive an expression for resonant frequency of series RLC circuit. | Electrical Engineering
Explain the suitability of aluminum as an electrical conductor with respect to its mechanical and electrical properties. Answer : Aluminum is an excellent and widely used electrical conductor, second only to copper in global usage. Its suitability is a trade-off: it is not as conductive as copper, but its significantly lower ... at a premium and high conductivity in a small package is essential, copper is the superior choice....
Stability analysis using Routh-Hurwitz array Answer : ### **1. The Big Picture: Why Do We Need This?** Imagine you've designed a system-it could be a cruise control for a car, a thermostat for a house, or a robot arm. The most important question you ... further sign changes, it's **Marginally Stable**. If there are sign changes, it's **Unstable**. |...
Industrial Measurements MCQs | Electrical Engineering
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 ...
Charge and Current : A current of 3.2 A flows through a conductor Calculate how much charge passes
Define the transfer function of a linear time-invariant (LTI) system.
Which of the following has Henry as their SI unit? | Electrical Engineering
Compare the working principles of a hydroelectric power plant and a nuclear power plant.
Supernode Analysis | Nodal Analysis with Supernode | Sinusoidal Steady State Analysis | AC Circuit
What is the role of a FACTS device like a STATCOM in a power transmission system?
The structure of the atom | Electrical Engineering
What are the main components of a battery electric vehicle (BEV) powertrain?
RL Parallel Circuit | Electrical Engineering
Compare and contrast the operational characteristics of a MOSFET and an IGBT.
Supermesh Analysis | 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....
What is copytrading ? | Electrical Engineering
Describe the function of an inverter in a power electronics system.
V-I characteristic of STATCOM | Electrical Engineering
What is the function of the Arithmetic Logic Unit (ALU) in a microprocessor?
Business Ideas to Consider: Starting Your Own Business and Turning Your Passion into a Career
What is the purpose of a substation in an electrical power grid?
Sinusoids and Phasors Solved Example Problem on Inductor | Electrical Engineering
What are the properties of silicon that make it a suitable material for semiconductors?
Permanent Magnet Moving Coil (PMMC) instrument
How can the Internet of Things (IoT) be used to create a smart home automation system?
Electric current | Electrical Engineering
What factors should be considered when estimating the cost of wiring a new residential building?
Unilateral Circuit | What is Unilateral Circuit? | Network Analysis | Network Theory | Electric Circ
What is the function of a rectifier in a power supply?
In tropical rain forest, most of the energy in ecosystem flows through | Electrical Engineering
Describe the main components and energy conversion stages of a thermal power plant.
Electrical Engineering Facts 76
Calculate the equivalent resistance of a circuit with three resistors (5Ω, 10Ω, 15Ω) connected in parallel.
Energy (Basic Electrical and Electronics Engineering Course) | Electrical Engineering
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....
Nodal Analysis in Time Domain | Sinusoidal Steady State Analysis | 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....
Phasors | Transform these sinusoids to phasors | Example 9.4 | 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)**....
Superposition Theorem | Electrical Engineering
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