Recent questions without an upvoted answer

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....

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....

If a wire is stretched to double its length. What will be its new resistivity?
Answer : The short answer is: **The new resistivity will be exactly the same.** --- ### The Detailed Explanation #### What is Resistivity? **Resistivity (ρ)** is an **intrinsic property** of a material. This ... 2) and area is halved (factor of 1/2). | Becomes **four times** the original resistance. |...

If potential difference V applied across a conductor is increased to 2V , how will the drift velocity of the electron change?
Answer : ### Short Answer If the potential difference V applied across a conductor is increased to 2V, the **drift velocity of the electrons will also double**. ### Detailed Explanation Let's ... the electric field, which doubles the force on the electrons, which doubles their average drift velocity....

If the temperature of a good conductor decreases, how does the relaxation time of electrons in the conductor change?
Answer : ### The Short Answer If the temperature of a good conductor decreases, the **relaxation time of electrons increases**. --- ### The Detailed Explanation To understand why, let's break ... **. This is why good conductors become even better conductors (less resistive) at lower temperatures....

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....

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....

Define earthing related to electrical wiring system.
Answer : ### Definition of Earthing **Earthing** (also known as **grounding** in North American terminology) is a fundamental safety measure in electrical wiring systems. It is the process of ... to operate immediately. It is a non-negotiable, critical component of any safe electrical installation....

Define dielectric failure of electrical insulating material.
Answer : ### Definition: Dielectric Failure **Dielectric failure**, also known as **dielectric breakdown** or **insulation failure**, is the event where an electrical insulating material, subjected to a sufficiently ... equipment. * **Safety Hazards:** Poses a significant risk of fire and electric shock....

Draw the labeled hysteresis loop for an electromagnetic material.
Answer : ![][1] hysteresis loop [1]: https://electrical-engineering.app/?qa=blob&qa_blobid=16263897287610247627...