For the best experience, please use Google Chrome.
Setting up your app...
Tap below to open the full experience.
Describe the main components and energy conversion stages of a thermal power plant.
RL series circuit with time domain | Phasors | Kirchhoff’s Laws in the Frequency Domain
Loading products...
From a fundamental engineering mechanics perspective, what is the primary difference between a beam and a shaft, given that both are often long, slender components used in structural and mechanical systems? Answer : The primary difference lies in the **type of load they are designed to resist** and, consequently, the **purpose they serve**. A **beam** is designed to resist **bending loads**, while a ... it supports. In such cases, engineers must analyze the **combined stresses** from both bending and torsion....
Mesh Analysis with Supermesh : For the circuit in Fig find i1 to i4 using mesh analysis
What are the main advantages of HVDC transmission over HVAC for long distances?
electrical wiring mcq questions | Electrical Engineering
What are the main advantages and disadvantages of solar power generation?
Simplify : log(2/3) + log (4/5) - log (8/15) | 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, $V_{supply} = ... to a much safer and more manageable **7.0 A**, protecting both the battery and the power supply from damage....
Mesh Analysis Example with Solution | Electrical Engineering
A battery of emf 10 V and internal resistance 3 Ohm is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed? Answer : ### Given Information: * **EMF of the battery (E):** 10 V * **Internal resistance (r):** 3 Ω * **Current in the circuit (I):** 0.5 A --- ### 1. What is the resistance of the ... text{V}$ Both methods give the same result. **Answer:** The terminal voltage of the battery is **8.5 V**....
Inductor (Basic Electrical and Electronics Engineering Course) | Electrical Engineering
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.**...
Electrical Engineering Notes App
What are the properties of silicon that make it a suitable material for semiconductors?
Voltage sources in series | Electrical Engineering
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....
Graphical representation of sinusoids | 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**....
1.4 Potential Difference or Voltage | 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....
Source transformation 5 | Electrical Engineering
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....
jumper wires #electricalengineering #electronicsengineering
Two wires A and B are of the same metal and of same length have their areas of cross section in the ratio 2:1 if the same potential difference is applied across each wire in turn, what will be the ratio of current flowing in A & B ? Answer : The ratio of the current flowing in wire A to wire B is **2:1**. --- ### Detailed Explanation Let's break down the problem using the relevant physics principles. #### 1. List the Given ... resistance, which is wire A. Our result confirms this: the current in A is twice the current in B....
Thevenin's Theorem Problem | Electrical Engineering
What are the main differences between Alternating Current (AC) and Direct Current (DC)?
Controllability problem 2| Electrical and Electronics Engineering | Electrical Engineering
Explain the basic components and architecture of a SCADA system.
Define the period of alternating current. | Electrical Engineering
What is the difference between a radial and a ring main electrical distribution system?
Thevenin's and Norton's Theorems 27 | Electrical Engineering
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....
Norton Equivalent #450 | 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} $$...
For R-C series circuit draw (i) Circuit diagram (ii) Vector diagram (iii) Waveform of v and i
Discover the fundamentals of electric current. Learn the definition, the basic formula (I = Q/t), the difference between AC/DC, and the distinction between conventional current and electron flow. Answer : ![][1] [1]: https://electrical-engineering.app/?qa=blob&qa_blobid=15457729789953541712 *** # What is Electric Current? A Complete Guide to the Basics Electric current is the ... industry has continued to use conventional current (positive to negative) as the standard for circuit analysis....
Given the circuit in Fig use KVL to find the branch voltages V1 to V4. | Kirchhoff's voltage law
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. |...
What are the key steps involved in conducting an energy audit for a commercial building?
Maximum Power Transfer Theorem Example | Electric Circuits | Network Analysis | Network Theory
What are the key differences between a manager and a leader in an organization?
Show that the matrix A is skew-symmetric. | Electrical Engineering
What is the fundamental difference in the physical mechanism and material structure between a Light Emitting Diode (LED) and a Laser Diode, given that both are semiconductor p-n junction devices that convert electricity into light? Answer : The difference lies in the nature of the photon emission process they utilize and the physical structure required to support that process. An LED relies on **Spontaneous Emission** to produce incoherent light, ... data | Fiber optics, barcode scanners, laser pointers, Blu-ray/DVD players |...
KVL Circuit Analysis | Electrical Engineering
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....
Maximum Power Transfer Theorem 1 | Electrical Engineering
What are the key elements of effective verbal communication?
Apply phasor analysis to evaluate the following | Electrical Engineering
What are the primary design considerations for the core and windings of an electrical transformer?
#EEE- Spectrum analyzer | Electrical and Electronics Engineering | Electrical Engineering
What are the primary causes of electrical breakdown in gaseous insulators?
Electrolytic Capacitor | Electrical Engineering
What are three major causes of deforestation and their impact on the environment?
Data Structure MCQ | Electrical Engineering
What are the fundamental limitations of traditional "hard-switched" PWM converters, and how do resonant or "soft-switching" techniques like Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) overcome these limitations to achieve higher efficiency and power density? Answer : This question addresses the critical challenge of **switching loss**, the primary barrier to increasing the operating frequency, and therefore the power density, of modern power converters. ** ... state-of-the-art applications like server power supplies, EV chargers, and renewable energy inverters....
Transfer switch | Electrical Engineering
What are the full forms of EQ, IQ and SQ ? Answer : Ans: The full forms of EQ, IQ and SQ are as follows: IQ - Intelligence Quotient EQ - Emotional Quotient SQ - Situational Intelligence Quotient...
Source Transformation | Electric Circuits | Problem 4.32 | Electrical Engineering
Three resistors 1 Ohm , 2 Ohm and 3 Ohm are combined in series. What is the total resistance of the combination? Answer : When resistors are combined in series, the total resistance is the sum of the individual resistances. The formula is: R_total = R1 + R2 + R3 Given the values: * R1 = 1 Ω * R2 = 2 Ω * R3 = 3 Ω ... = 1 Ω + 2 Ω + 3 Ω = 6 Ω So, the total resistance of the combination is **6 Ohms**....
Phasors Evaluate the following complex numbers and leave your results in polar form
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)....
Calculate vo in the circuit of Fig. | Sinusoids and Phasors | 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 ...
Digital Electronics : Binary to Decimal Conversion Example
What is the role of a FACTS device like a STATCOM in a power transmission system?
Series RC circuit AC Analysis: Finding RMS Voltage and Current, Type of Circuit and Power Factor
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....
Hexadecimal to Binary | Digital Electronics | Electrical Engineering
What is the function of the Arithmetic Logic Unit (ALU) in a microprocessor?
Why do most countries use 50Hz ? | Electrical Engineering
What is the purpose of a substation in an electrical power grid?
Phasors | Evaluate these complex numbers | Electrical Engineering
What factors should be considered when estimating the cost of wiring a new residential building?
Mesh Analysis Example | Electrical Engineering
What is the function of a rectifier in a power supply?
MCQ on High Voltage Engineering | 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....
Brain Teaser Puzzle : Move two matchsticks to make the equation true | 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....
How to find current using source transformation | 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)**....
basics of electrical engineering | Ohm's Law
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) |...
Root mean square (RMS) Value of Alternating Current | 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**....
Problem on electrical power and energy 3 | Electrical Engineering
A Carbon resistor has three strips of red colour and a gold strip. What is the value of the resistor? What is its tolerance? Answer : The value of a carbon resistor is determined by the standard resistor color code system. For a 4-band resistor: * **Band 1:** First significant digit * **Band 2:** Second significant ... a new resistor with these color bands will have an actual resistance somewhere between 2090 Ω and 2310 Ω....
What is the capital city of Japan
Two electric bulbs A and B are marked 220V , 40W and 220V 60W respectively. Which one has a higher resistance? Answer : **The 40W bulb (Bulb A) has a higher resistance.** Here's the detailed explanation of why: ### The Relationship The relationship between Power (P), Voltage (V), and Resistance (R) is given by ... to get more water through a pipe; you need a wider pipe (less resistance) to increase the flow rate....
Find Vo in Fig. | Operational Amplifier | 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 |...
Supermesh analysis with dependent current source | Electrical Engineering
What is Voltage? A Simple Guide to Electric Pressure (V) Answer : ![][1] [1]: https://electrical-engineering.app/?qa=blob&qa_blobid=14655249534964376862 *** ### What is Voltage? A Simple Guide to Electric Pressure (V) Voltage, often described as ... always more dangerous. The level of danger from electricity depends on a combination of voltage and current....
Norton's Theorem Example | Electric Circuits | Network Analysis | Network Theory
Find the value of unknown resistance X in the circuit shown in the figure if no current flows through the section AO. Also calculate the current drawn by the circuit from the battery of emf. 6V ... resistance. ![][1] [1]: https://electrical-engineering.app/?qa=blob&qa_blobid=394010198424626099 Answer : ### Part 1: Finding the value of the unknown resistance X The problem states that no current flows through the section AO. Let's label the central junction point as 'O'. 1. **Identify the Principle:** The ... resistance **X is 6Ω**. * The current drawn by the circuit from the battery is **1A**....
Leakage Flux | Electrical Engineering
Describe the principle of electric arc welding.
Alternating current | Electrical Engineering
279 questions
206 answers
35.1k users