Recent questions and answers

What is the most famous theorem?
Answer : One of the most famous theorems is **Pythagoras' Theorem**. It states that in a right-angled triangle, the square of the length of the hypotenuse (the side opposite the right angle) ... fundamental in geometry and is widely used in various fields like engineering, architecture, and even navigation....

What is the SI unit of permittivity class 12?
Answer : The SI unit of permittivity is **farad per meter (F/m)**. Permittivity (denoted as \( \varepsilon \)) is a measure of how much electric field is 'permitted' to pass through a material. It is defined as the ... meter}^2 \] To sum up, the SI unit of permittivity is **farad per meter (F/m)**....

Is mutual induction AC or DC?
Answer : Mutual induction can occur in both AC (alternating current) and DC (direct current) systems, but it is most commonly associated with AC. ### Here's why: - **AC ( ... AC systems because the current changes continuously, producing a constantly changing magnetic field that induces voltage....

What is the full form of LC patch cord?
Answer : The full form of **LC patch cord** is **Lucent Connector patch cord**. An LC patch cord is a type of fiber optic cable used to connect devices like switches, routers, and other ... , which was later acquired by Alcatel. The LC connector is known for its small size and reliable performance....

When to use Fleming's right hand rule?
Answer : Fleming's Right Hand Rule is used to determine the direction of the induced current when a conductor (such as a wire) moves through a magnetic field. It helps us understand how generators work, where ... into electrical energy. Does that make sense? Would you like a quick example to solidify it?...

What are the classification of transmission voltages?
Answer : Transmission voltages are typically classified based on the level of voltage used to transport electrical power across long distances from power plants to substations, and then to local distribution networks. ... of energy, and they are stepped down at substations for use in homes and businesses....

Explain the concept of reliability in power electronic systems.
Answer : In power electronic systems, **reliability** refers to the ability of the system to perform its intended function without failure over a specified period of time, under normal operating ... can ensure that power electronic systems deliver continuous, safe, and efficient performance over time....

What is the role of Fourier transform in signal processing?
Answer : The Fourier Transform (FT) plays a crucial role in signal processing by allowing us to break down a complex signal into simpler components. Specifically, it transforms a signal from ... making it essential in many signal processing applications like filtering, compression, modulation, and detection....

What is the daily use of full wave rectifier?
Answer : A full-wave rectifier is used to convert alternating current (AC) into direct current (DC). It's commonly used in a variety of daily applications, especially in devices that require a stable DC ... grid (which alternates back and forth) into a steady flow that is usable for many electronic devices....

What is the daily use of DC motor?
Answer : DC motors are used in a wide variety of applications in our daily lives, thanks to their simplicity, control, and efficiency. Here are some common daily uses of DC motors: 1. **Electric ... and can run directly off batteries or DC power sources, making them versatile for many consumer products....

What are line names?
Answer : In the context of electrical engineering, **line names** refer to the terms used to identify different types of electrical lines or conductors in a system. These lines carry electrical power and can vary ... were referring to, or is there a different context for "line names" you had in mind?...

What are the advantages of mesh model?
Answer : The mesh model, or **mesh analysis**, is a method used in electrical engineering to analyze planar circuits. It's particularly useful in solving circuits that can be reduced to a set of linear ... circuit is planar. It simplifies the problem and reduces the number of equations you need to solve....

How does a bidirectional DC-DC converter achieve power flow in both directions?
Answer : A **bidirectional DC-DC converter** allows power to flow in both directions, meaning it can step up or step down voltage depending on the direction of energy flow. This is particularly ... control system is responsible for switching between these two modes based on the direction of energy transfer....

How to convert 8 bit binary to BCD?
Answer : To convert an 8-bit binary number to Binary-Coded Decimal (BCD), follow these steps: ### 1. Break down the 8-bit binary number: First, split the 8-bit binary number into two 4-bit sections ... each decimal number as its BCD equivalent. Let me know if you'd like more examples or clarification!...

State any two application of repulsion motor.
Answer : Two applications of a repulsion motor are: 1. **Washing Machines**: Repulsion motors are often used in washing machines due to their ability to start with a high torque, making them ... run with relatively low maintenance. The high starting torque helps in getting the fan blades moving easily....

What are impedance and admittance parameters used for in a 2 port network?
Answer : In a two-port network, **impedance** and **admittance** parameters are used to describe the relationship between the voltage and current at the two ports of the network. These parameters help to ... * and are often used in **signal processing, control systems**, and **communication** applications....

What is Fleming's left-hand rule for?
Answer : Fleming's Left-Hand Rule is used to determine the direction of force (motion) experienced by a current-carrying conductor placed in a magnetic field. It helps us understand how motors work. ### ... you like a more detailed explanation or examples of how this rule works in real-world applications?...

What is K in capacitor formula?
Answer : In the capacitor formula, **K** refers to the **dielectric constant** (also called the **relative permittivity**) of the material between the capacitor's plates. The general formula for ... the capacitor's capacitance. Common materials used for the dielectric are glass, ceramic, plastic, etc....

What is the role of control circuitry in an inverter?
Answer : The control circuitry in an inverter plays a crucial role in ensuring that the inverter operates efficiently and effectively. Here's a breakdown of its main functions: 1. **Switching ... voltage and frequency, uses feedback to improve performance, and protects the inverter from potential faults....

What is the difference between an LED and an OLED?
Answer : The difference between an **LED** (Light Emitting Diode) and an **OLED** (Organic Light Emitting Diode) primarily lies in the materials used to produce light and their properties. Here's ... and more flexible displays. However, OLEDs can be more expensive and may have slightly shorter lifespans....

What is ohm in SI unit?
Answer : In the International System of Units (SI), **ohm** (symbol: Ω) is the unit of electrical resistance. It is defined as the amount of resistance in a conductor when a voltage of one volt ( ... resistance is 1 ohm, a 1-volt potential difference across the conductor will create a current of 1 ampere....

Why Kirchhoff's law is better than Ohm's law?
Answer : Kirchhoff's laws and Ohm's law are both fundamental principles in electrical circuits, but they serve different purposes. Saying one is "better" than the other depends on the context, as both are ... while Kirchhoff's laws help set up the equations that describe the overall behavior of the circuit....

Is a TRIAC switch AC or DC?
Answer : A TRIAC switch is used primarily for **AC (Alternating Current)** applications. TRIAC stands for **Triode for Alternating Current**, and it's a type of semiconductor device that can control the ... transistors are used for switching in DC circuits. To summarize: **TRIAC = AC applications**....

Define power factor.
Answer : Power factor is a measure of how effectively electrical power is being used in a system. It is the ratio of **real power** (the power that actually does work) to **apparent power** (the ... the system is not using the power effectively, which can lead to wasted energy and higher electricity costs....

What are the undesirable effects of eddy current and hysteresis loss ?
Answer : Eddy current and hysteresis losses are two types of energy losses that occur in electrical machines, transformers, and other equipment that involve magnetic fields. Both are undesirable because ... . Managing these losses is crucial for improving the performance and longevity of electrical devices....

What is series circuit analysis?
Answer : **Series circuit analysis** refers to the process of examining and understanding the behavior of a circuit where all components (such as resistors, capacitors, or inductors) are connected end-to-end ... voltage drops, and total resistance in a circuit where all components are connected in one path....

How does a resonant converter differ from a traditional converter?
Answer : A **resonant converter** differs from a **traditional converter** mainly in how it switches and controls energy transfer between components like inductors, capacitors, and ... attractive for applications requiring high efficiency and low electromagnetic interference at higher frequencies....

What is known as for loop?
Answer : A **for loop** is a programming concept used to repeat a block of code multiple times. It is especially useful when you know in advance how many times you want to repeat the action. The general ... or over a collection (like a list or range). - It makes code more efficient and reduces repetition....

What is the function of a voltage-controlled resistor?
Answer : A **voltage-controlled resistor (VCR)** is a type of electronic component whose resistance can be controlled by an applied voltage. This means that, instead of being fixed like a ... dynamic adjustment of resistance to control current or voltage levels automatically based on a control voltage....

Explain the concept of Q factor in audio equalization.
Answer : The **Q factor** (Quality factor) in audio equalization refers to the width of a frequency band that is being affected by an equalizer filter. In simpler terms, it controls how narrow or wide the ... the sound, making it either more focused or more broad, depending on what you're trying to achieve....

What is the unit of work and power?
Answer : The unit of **work** and **power** are as follows: 1. **Work**: The unit of work is the **Joule (J)**. Work is done when a force causes displacement in an object. One joule is the amount of work ... - 1 Watt = 1 Joule / 1 second So, work is measured in joules, and power is measured in watts....

What is the principle of duality in the universe?
Answer : The principle of duality in the universe refers to the idea that many things exist in pairs of opposites or complementary aspects. In simple terms, it means that for every concept or phenomenon, there ... are part of a larger, interconnected whole. Each helps define and give meaning to the other....

What are the 3 types of interference?
Answer : Interference refers to the way waves interact with each other. There are three main types of interference: 1. **Constructive Interference**: - This happens when two waves meet in such a ... interacting. These three types of interference are commonly observed in light, sound, and water waves....

Why is Arduino used in IoT?
Answer : Arduino is widely used in IoT (Internet of Things) for several key reasons: ### 1. **Simple and Easy to Use:** Arduino has a user-friendly platform with easy-to-understand ... of its simplicity, low cost, extensive community support, and ability to easily interface with sensors and networks....

What is 11KV voltage?
Answer : 11 kV (kilovolt) refers to an electrical voltage level of 11,000 volts. It is a commonly used voltage level in electrical distribution systems, particularly for medium-voltage networks. In simple terms: ... would be stepped down to a safer and more usable voltage (like 220V) for everyday devices....

What is called capacitor?
Answer : A **capacitor** is an electrical component that stores and releases electrical energy in a circuit. It consists of two conductive plates separated by an insulating material called a **dielectric** (such as air, ... measured in **farads (F)**. The larger the capacitor, the more charge it can store....

What is permittivity and relative permittivity Class 12?
Answer : ### **Permittivity (ε)** Permittivity is a property of a material that determines how much electric field (E) is allowed to pass through it. In simple terms, it tells us how easily a ... high relative permittivity (εᵣ > 1) can store more electrical energy compared to materials with lower values....

What is the working principle of PNP?
Answer : The working principle of a **PNP transistor** is based on the flow of current through its three layers: **Emitter (P)**, **Base (N)**, and **Collector (P)**. Here's how it works: ... to the **Collector**. The transistor amplifies the signal in this way, making it useful in many electronic circuits....

What is the structure of ADC?
Answer : An ADC (Analog-to-Digital Converter) is a crucial component in digital electronics that converts continuous analog signals (such as voltage or current) into a discrete digital form that a ... into discrete levels, encoding it into binary, and providing the output as a digital representation....

What is the working principle of DC motor starter?
Answer : A **DC motor starter** is a device used to safely start and stop a DC motor. Its main function is to limit the initial inrush of current that flows when the motor is started. ... smoothly by controlling the voltage and current flow, thus preventing damage to the motor and the electrical system....

Why is ammeter in series?
Answer : An ammeter is placed in series with a circuit because it is designed to measure the current flowing through that specific part of the circuit. Here's why it's in series: 1. ** ... in series ensures it can accurately measure the current without disrupting the flow of electricity in the circuit....

Explain the concept of forward error correction (FEC).
Answer : Forward Error Correction (FEC) is a technique used in communication systems to detect and correct errors in data transmission. It involves adding extra bits (called "redundant bits" or "error-correcting ... can fix the errors and still get the correct message without needing to ask for a resend....

What is Hall effect in AC current?
Answer : The **Hall Effect** is a phenomenon that occurs when a current flows through a conductor (like a wire), and a magnetic field is applied perpendicular to the current. It creates a ... complexity of alternating direction, making the Hall voltage vary in response to the changing current direction....

What is the difference between motor and generator PDF?
Answer : The main difference between a motor and a generator lies in their function and how they convert energy: 1. **Motor:** - **Function:** A motor converts electrical energy into mechanical energy (motion) ... energy. Would you like a PDF with these details? If so, I can create one for you....

Do electrical engineers have a good salary?
Answer : Yes, electrical engineers generally have good salaries. The pay can vary depending on factors like location, level of experience, industry, and the specific company they work for. In ... semiconductor manufacturing, or robotics, may offer higher salaries due to the specialized knowledge required....

Why half wave rectifier is not practically used?
Answer : A half-wave rectifier is not practically used for a few reasons: 1. **Inefficient Power Use**: In a half-wave rectifier, only half of the input signal is used, meaning the ... rarely used in practical applications, as more efficient and smoother alternatives like full-wave rectifiers are preferred....

Which engineering is more difficult?
Answer : The difficulty of an engineering field depends on various factors, such as personal interests, strengths, and how much effort you're willing to put into learning. Different people find different ... is the one that challenges you the most, depending on your personal interests and strengths!...

Is a lead acid battery a galvanic cell or electrolytic cell?
Answer : A **lead-acid battery** is a **galvanic cell** (also known as a voltaic cell). In a galvanic cell, chemical reactions take place spontaneously to produce electrical energy. In ... -spontaneous reaction. Lead-acid batteries work by spontaneous reactions, so they are classified as galvanic cells....

What is the form of the energy stored in the batteries?
Answer : The energy stored in batteries is primarily in the form of **chemical energy**. Here's how it works: - Inside a battery, there are chemical reactions happening between the materials (like metals ... to summarize: - **Energy form stored**: Chemical energy - **Energy released**: Electrical energy...

Which is the largest DC transmission line in India?
Answer : The largest DC (Direct Current) transmission line in India is the **North-East to Agra (NEAG) HVDC link**. It is a **600 kV, 3,000 MW** High Voltage Direct Current (HVDC) ... to enhance the national grid's reliability and efficiency, especially when it comes to long-distance power transmission....