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Why is copper called rabbit?
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Which factor the copper loss of a transformer depends?

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What is the nickname of copper metal?
Answer : Copper is often nicknamed "red metal" because of its reddish-brown color. Another common nickname is "electrical metal" due to its excellent conductivity, which makes it widely used in electrical wiring....

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

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Compare copper and aluminium on the basis of: (i) Tensile strength (ii) Conductivity (iii) Specific gravity (iv) Application.

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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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State Magneto-striction. Draw Hysteresis loop for: (i) High silicon steel (ii) Copper (iii) Soft iron (iv) Wood.

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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.

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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.

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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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Why is IT called electronics?
Answer : The term "electronics" refers to the branch of science and technology that deals with the design and use of circuits, devices, and systems that involve the flow of electrons. It's called " ... electronics because it deals with devices and systems that depend on the flow of electrons to function....

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Why is it called optical fibre?
Answer : It's called **optical fiber** because it uses **light** to transmit data. "Optical" refers to anything related to light, and "fiber" refers to the thin, flexible strands of material, which in this ... the use of light, and "fiber" refers to the small, thread-like structure that carries that light....

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