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What is the main difference between a rectifier and an inverter in power electronics? Answer : A rectifier converts AC (Alternating Current) → DC (Direct Current). It is used in power supplies, battery charging, and DC motor drives. Example: diode bridge rectifier. An inverter converts DC ... , wind), UPS systems, and variable-frequency drives. Example: PWM (Pulse Width Modulated) inverter....
Superposition Theorem Example | Electrical Engineering
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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....
Electrical Engineering | Electrical Machine | Transformer | MCQ 2 | Electrical Engineering
Describe the role of an Analog-to-Digital Converter (ADC) in an embedded system that measures temperature.
Mesh analysis 2 | Electrical Engineering
What is the function of a rectifier in a power supply?
A dc voltage with ripple is given by v(t) = [100 + 10 sin(ωt) - 5 sin(3ωt)] | 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 ...
Series and parallel capacitor problem 7 | Electrical Engineering
What is the role of a FACTS device like a STATCOM in a power transmission system?
Thevenin’s Theorem | Electric Circuits | Practice Problem 4.9 | Electrical Engineering
What is the purpose of a substation in an electrical power grid?
Hindi : Passive Network | Network Analysis | Network Theory | Electric Circuits | ECI | ECN
Define the transfer function of a linear time-invariant (LTI) system.
Hindi : Distributed Network | Network Analysis | Network Theory | Electric Circuits | ECI | ECN
Describe the main components and energy conversion stages of a thermal power plant.
Gray Code to Binary Example | Electrical Engineering
What is the function of the Arithmetic Logic Unit (ALU) in a microprocessor?
Ages aptitude 4 | 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....
How can we improve our study skills? | 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....
Norton's Theorem with Dependent Source Problem | Electrical Engineering
A set of n-identical resistors, each of resistance R ohm when connected in series have an effective resistance of X ohm and when the resistors are connected in parallel the effective resistance is Y ohm. Find the relation between R , X and Y ? Answer : Let's break this down step-by-step to find the relationship between R, X, and Y. ### 1. Resistors in Series When resistors are connected in series, their total effective resistance is the sum of ... the **geometric mean** of the total series resistance (X) and the total parallel resistance (Y)....
DC Motors MCQ | Electrical Engineering
Describe the term 'Nuclear shielding' in Nuclear Power Plant. Answer : --- ### **Nuclear Shielding in a Nuclear Power Plant** In a nuclear power plant, **Nuclear Shielding** refers to the use of specific materials and structures designed to absorb or block ... , making it possible to operate a nuclear reactor safely and protect workers and the public from harm....
Digital Electronics | Octal to Decimal Conversion Example
What is the difference between a diode and a transistor in electronics? Answer : A diode is a two-terminal device that allows current to flow in only one direction. It is mainly used for rectification (converting AC to DC), voltage regulation, and protection ... input current/voltage, making it essential in signal amplification, digital logic circuits, and power control....
Series and Parallel Resistors : Find i and Vo in the circuit of Fig | Electrical Engineering
Describe an experiment to determine the acceleration due to gravity (g) using a simple pendulum.
Wye Delta Transformation 2 | Electrical Engineering
Describe the properties of copper that make it an ideal material for electrical wiring.
The voltage v = 12 cos(60t + 45°) is applied to a 0.1-H inductor. Find the steady-state current thro
What is the difference between an open-loop and a closed-loop control system?
Electrical sources | Dependent sources | Independent sources | Ideal sources | Practical sources
What is the basic principle behind how a RADAR system detects an object's range and velocity?
How to find input impedance with dependent source ? | Impedance Combinations
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 ...
Electrical Engineering Facts 71
Describe the practical application of Pascal's law in hydraulic systems.
Find the z parameters of the two-port network in fig. | 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....
Source free RC circuit 1 | Electrical and Electronics Engineering | Electrical Engineering
What is a Real-Time Operating System (RTOS), and why is it frequently used in embedded systems instead of a general-purpose operating system like Linux or Windows? Answer : The answer lies in one critical concept: **determinism**. While a general-purpose OS is designed for high throughput and fairness, an RTOS is designed for predictability and meeting strict timing deadlines. ... system where **failing to complete a task on time is considered a total system failure.**...
Laws of Indices (askoranswerme com) | Electrical Engineering
Describe the working principle of a permanent magnet moving-coil (PMMC) instrument.
Brain Teaser Puzzle : Move two matchsticks to make the equation true | Electrical Engineering
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 |...
Assuming an ideal op-amp, determine the voltage gain of | Operational Amplifier
List the types of turbine used in hydro power plant. Answer : The selection of a specific turbine for a hydropower plant depends primarily on two factors: * **Water Head:** The vertical distance the water falls from the reservoir to the turbine. * **Flow Rate:** ... | Very Low (2-20m)| High to Very High| Generator and turbine in a submerged pod. |...
Advantages of three phase induction motor | Electrical Engineering
Explain the basic components and architecture of a SCADA system.
Basic Circuit Elements | Electrical Engineering
How can the Internet of Things (IoT) be used to create a smart home automation system?
Norton's Theorem Problem | Electrical Engineering
Compare the working principles of a hydroelectric power plant and a nuclear power plant.
Electrical Engineering Facts 37
What are the key steps involved in conducting an energy audit for a commercial building?
State eight requirements of an ideal traction system. | Electrical Engineering
What are the key differences between a manager and a leader in an organization?
Phasors and Sinusoids Problem | Apply phasor analysis to evaluate the following | Electrical Enginee
In designing an IoT application, what are the key trade-offs between processing data in the Cloud versus at the Edge, and can you provide a real-world example where each approach is clearly superior? Answer : This question addresses the fundamental architectural choice of "where the thinking happens" in an IoT system. The decision between Cloud and Edge computing directly impacts an application's ... data analytics, and centralized device management. This combination provides the best of both worlds....
Which lamp will glow brighter ? | Electrical Engineering
What is the purpose of grounding (earthing) in an electrical installation?
How to find node voltages ? | Electrical Engineering
Explain the concept of 'slip' in an induction motor.
Voltages out of phase | Electrical Engineering
What is the purpose of earthing or grounding in an electrical installation? Answer : The primary and most critical purpose of earthing (or grounding, as it's more commonly called in North America) in an electrical installation is **safety**. It acts as a ... that saves lives and prevents fires by ensuring any dangerous electrical fault is instantly and automatically disconnected....
Thevenin's and Norton's Theorems 19 | Electrical Engineering
Compare and contrast the operational characteristics of a MOSFET and an IGBT.
Supernode analysis with dependent source | 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} $$...
Class 12 | Maths | Complex Numbers | Express the complex numbers modulus-amplitude form - √3 + i
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....
Top 50 Alternator MCQs with Answers | Synchronous Generator | Synchronous Machines MCQs
The storage battery of a car has an emf of 12V . If the internal resistance of the battery is 0.4 Ohm , what is the maximum current that can be drawn from the battery? Answer : The maximum current that can be drawn from the battery is **30 Amperes (A)**. --- ### Detailed Explanation #### 1. Understand the Concepts * **EMF (Electromotive Force, $\mathcal{E ... even explode. This calculation is a theoretical maximum. **Never attempt to short-circuit a car battery.**...
Nodal Analysis of Electric Circuits Example 5 | Electrical Engineering
Explain the concept of inheritance in C++ with a simple example.
For the circuit in fig. use KCL to find the branch currents | kirchhoff's current law
Calculate the equivalent resistance of a circuit with three resistors (5Ω, 10Ω, 15Ω) connected in parallel.
Power (Basic Electrical and Electronics Engineering Course) | 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....
MCQ on Battery | 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)**....
RC circuit in time domain |Phasors | Kirchhoff’s Laws in the Frequency Domain | Electrical Engineer
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. |...
Permanent Magnet DC PMDC Motor MCQs 2 | 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**....
Series and Parallel Resistors : All resistors in Fig are 1 Ω each Find Req
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, $V_{supply} = ... to a much safer and more manageable **7.0 A**, protecting both the battery and the power supply from damage....
Permanent Magnet Moving Coil (PMMC) instrument | Electrical Engineering
A battery of emf 10 V and internal resistance 3 Ohm is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed? Answer : ### Given Information: * **EMF of the battery (E):** 10 V * **Internal resistance (r):** 3 Ω * **Current in the circuit (I):** 0.5 A --- ### 1. What is the resistance of the ... text{V}$ Both methods give the same result. **Answer:** The terminal voltage of the battery is **8.5 V**....
Mesh Analysis for Circuits Explained | 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....
What is industrial revolution ? | Electrical Engineering
In a potentiometer arrangement, a cell of emf 1.25V gives a balance point at 35.0cm length of the wire. If the cell is replaced by another cell and the balance point shifts to 63.0cm , what is the emf of the second cell? Answer : ### Principle The working principle of a potentiometer is that the potential drop across any portion of a wire of uniform cross-section is directly proportional to the length of that portion, provided a constant current flows ... 2.25 V** ### Answer The EMF of the second cell is **2.25 V**....
Thevenin Equivalent Circuit Solved Example | Electric Circuits | Network Analysis | Network Theory
Two heated wires of the same dimensions are first connected in series and then it’s parallel to a source of supply. What will be the ratio of heat produced in the two cases? Answer : Here is the step-by-step solution: ### The Short Answer The ratio of heat produced in the series case to the parallel case is **1:4**. --- ### Detailed ... proportional to this current, the parallel circuit draws significantly more power and therefore produces significantly more heat....
four-quadrant operation of an electric motor | Electrical Engineering
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