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

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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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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A 500kVA distribution transformer having copper and iron losses of 5kW and 3kW respectively on full load. The transformer is loaded as shown below: Loading (kW) Power Factor (Lag) No. of hours 400 0.8 06 300 0.75 12 100 0.8 03 No load - 03 Calculate the all-day efficiency.
Answer : To calculate the all-day efficiency of the transformer, we need to consider the total energy output, the total energy input, and the losses over a 24-hour period. The transformer experiences two types of ... \] ### Final Answer: The all-day efficiency of the transformer is approximately **98.39%**....

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With reference to GTO answer the following:

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Compare orifice plate with Venturi tube with reference to: (i) Working principle (ii) Construction (iii) Cost (iv) Pressure loss.

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State the necessity of synchroscope and with neat sketch explain its working.

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.

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 taken as reference for drawing the phasor diagram in parallel connection?

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What is taken as reference for drawing the phasor diagram in series connection?

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Which loss is called as copper loss?

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Which branch is tough electrical or mechanical?

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Which field is best mechanical or electrical?

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What is matter wave and its properties?

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What is a dielectric and its properties?

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What is a vector and its properties?

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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What is the Fourier transform and its properties?

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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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The power input to a 500V 50Hz 6Pole 3 phase induction motor running at 975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses are 2kW. Calculate: (i) Slip (ii) Rotor copper loss (iii) Shaft power (iv) Efficiency

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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?

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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Explain the method of separation of variables with an example.

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What is a Partial Differential Equation (PDE)? Explain with an example.

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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?

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?

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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