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Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties.
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Explain the suitability of copper as an electrical conductor with reference to its mechanical and electrical properties.

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Explain with justification two uses of each of two following as an electrical conductor: (i) Brass (ii) Silver.

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What is the relation between applied voltage and emf induced with respect to flux wave?
Answer : The relationship between the applied voltage and the induced electromotive force (emf) in the context of flux waves is rooted in Faraday's Law of Induction. Let me explain this step by step in simple ... the flux changes, the higher the induced emf will be. Does this help clarify the relationship?...

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State the properties of copper and aluminium which make them good conductors of electricity.

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Select insulating materials for following parts: (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Answer : Here are the insulating materials typically used for each of the given applications: 1. **Insulation between heating element and base plate of electric iron**: ** ... on their insulating properties, heat resistance, dielectric strength, and ability to withstand environmental conditions....

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What is the rate of change of electric potential with respect to displacement called?

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Define the following terms with respect to protective relays: i) Relay time ii) Reset current iii) Plug setting multiplier iv) Time setting multiplier.

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State any four IE Rules to be followed in respect of safety while working on electrical installation system.

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How does a piezoelectric sensor convert mechanical stress to electrical signals?

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How does a motor convert electrical energy to mechanical energy?

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State the necessity of synchroscope and with neat sketch explain its working.
Answer : ### Necessity of a Synchroscope A **synchroscope** is an important device used to measure and indicate the **synchronization** of the speed, frequency, and phase of an incoming alternator (generator) ... generator is in sync with the grid, and the circuit breaker can be closed to connect them....

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State any four properties of conductor material used for overhead conductor.
Answer : Here are four important properties of conductor materials used for overhead conductors: 1. **High Electrical Conductivity**: The material should allow electric current to pass through it ... conductor. These properties ensure efficient and durable operation of overhead power transmission lines....

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What is a vector and its properties?
Answer : A **vector** is a mathematical quantity that has both **magnitude** (size) and **direction**. It's used to represent things like displacement, velocity, force, and other physical quantities ... they help us describe motion, forces, and other physical phenomena that have both size and direction....

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Draw the diagram representing transposition of conductor and state its importance.

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What is the relationship of temperature with the resistance and resistivity of a conductor?

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Describe the main features of various types of generators and their suitability w.r.t wind power generation.

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Explain the criteria to be applied in deciding the earthing system for an electrical installation.

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Illustrate the benefits of time off day and peak off day tariff relevant to energy cost along with its impact on energy bill.

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With neat sketch of PMMC instrument explain its working briefly.

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What is pyrometry? Explain the working of optical pyrometer with a neat diagram. State its one application.

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Draw the constructional diagram of LVDT. State its working principle. What is residual voltage? Explain with a neat diagram.

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Explain full adder with its logic diagram & truth table.

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Describe with sketch the working of Variable frequency drive as an energy conservation device.

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Illustrate with neat sketch the working of automatic power factor corrector as an energy conservation device.

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Compare copper and aluminium on the basis of: (i) Tensile strength (ii) Conductivity (iii) Specific gravity (iv) Application.
Answer : Here's a simple comparison between copper and aluminum based on the four properties you mentioned: ### 1. **Tensile Strength:** - **Copper:** Copper has a higher tensile ... and mechanical applications, while aluminum is preferred where weight, cost, and corrosion resistance are more important....

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Is a bimetallic strip used as a to control temperature in electrical appliances?

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How does the resistance of a conductor change if its temperature is increased?

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Why does the resistance of a conductor rise with temperature class 12?

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How does the resistivity of a conductor vary with temperature class 12?
Answer : In Class 12, when studying the resistivity of a conductor, you'll learn that the resistivity of most conductors increases with temperature. This is because as temperature rises, the atoms ... temperature increases, the resistivity increases, meaning they become poorer conductors as they get hotter....

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How does the resistance of a conductor vary with temperature?

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Why does the resistance of a conductor increase with increasing temperature?

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What is the difference between a conductor and an insulator?

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What is the difference between Electro-magnetic and electro-mechanical transients?

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A 3 phase line of 4 km length delivers 4000 kW at a p.f of 0.8 lagging to a load the resistance and reactance per km of each conductor are 0.2 Ω and 0.5 Ω respectively if the voltage at the supply end is maintained at 11 kV. Calculate the received end voltage and efficiency of line.
Answer : Let's break down the problem step by step and calculate the received end voltage and the efficiency of the line. ### Given Data: - Power delivered to the load, \( P = 4000 \, \text{kW} \) - Power factor, \( \text{p. ... voltage**: \( 10.43 \, \text{kV} \) - **Efficiency of the line**: \( 98.61\% \)...

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What is the effect of temperature on the resistance of a conductor explain?
Answer : The resistance of a conductor is affected by temperature. In general, for most conductors (like metals), the resistance **increases with an increase in temperature**. Here's how ... this effect is different for materials like semiconductors, which decrease in resistance as temperature increases....

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What are the safety considerations when working with electrical wiring in areas prone to flooding or storm surges?

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What is the term polarization of a dielectric and write its relation with susceptibility?
Answer : **Polarization of a Dielectric:** Polarization refers to the process in which the positive and negative charges within a dielectric material (an insulating material) shift slightly when an ... *polarization** depends directly on both the applied electric field and the material's susceptibility....

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Describe the process of ultrasonic welding with a neat sketch and mention its applications.

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Derive the torque equation of 3 φ I.M. under running condition.k) Explain production of R.M.F. in 3-phase I.M. when 3 φ supply is fed to it. Draw its phasor diagram.

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Explain with a circuit diagram the use of a potential transformer to measure 33kV.

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Explain with a neat circuit diagram only the Scott connection scheme for the conversion of three-phase supply to two-phase supply. Name one application of the same.

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Explain with a neat sketch the Pilot wire protection scheme applied to transmission line.

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Explain the conditions for setting up negative phase sequence currents in an alternator. Draw the protective scheme to detect them and operate the CB.

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