Hot questions

Compare the casing / capping system of electrical wiring to concealed system of electrical wiring. On the basis of look, cost, life, safety retentivity of material and suitability for locations.
Answer : This comparison covers two of the most common methods for electrical wiring in buildings. Here is a detailed comparison of the Casing/Capping system and the Concealed Conduit system based on your ... and safety to the property. It is the standard for modern residential and commercial construction....

State the properties of copper and aluminium which make them good conductors of electricity.
Answer : ### 1. Presence of Delocalized Valence Electrons This is the most fundamental reason. * **What it is:** In metallic bonding, the outermost electrons (valence electrons) of the ... density and lower cost make it a vital material for specific applications like long-distance power transmission....

Why is constantan or manganin used for making standard resistors?
Answer : Constantan and manganin are used for making standard resistors for a specific combination of four key properties that make them ideal for precision applications. Here's a breakdown of why these alloys ... precision and stability required in a metrology lab, **manganin is the preferred material.**...

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....

State and explain Kirchhoff’s law?
Answer : Kirchhoff's laws are two fundamental principles used to analyze electric circuits. They were formulated by Gustav Kirchhoff in 1845 and are based on the conservation of charge ... =blob&qa_blobid=16131873694589351449 [2]: https://electrical-engineering.app/?qa=blob&qa_blobid=10917265924274549047...

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....

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**....

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....

Name any one material having a small value of temperature coefficient of resistance. Write one use of this material?
Answer : **Material:** **Manganin** (an alloy of copper, manganese, and nickel) **Use:** Due to its very low temperature coefficient of resistance, it is used to make ** ... for electrical measuring instruments like ammeters and Wheatstone bridges, where a stable and predictable resistance is essential....

A high tension (HT) supply of, say, 6 kV must have a very large internal resistance. Why?
Answer : The primary reason is **safety and current limiting**. Let's use Ohm's Law ($V = IR$) to understand this. A power supply can be modeled as an ideal voltage source ($V_s$) in series ... HT supply for **power transmission** has a very low internal resistance for **efficiency and power delivery**....