A- If the resistance of an aluminum wire at room temperature (20 C°) is 100 m2; at what temperature will its resistance increase to 120 m2? (Aluminum Temperature coefficient 0.0039 lat room temperature).

Q: Determine the thermal coefficient of resistance of copper at 50°C, then use this value to determine…

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Q: A silver wire has a resistance of 2.1 22 at 27.5 °C, and a resistance of 2.7 22 at 100 °C. Determine…

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Q: Determine the thermal coefficient of resistance of copper at 500C, then use this value to determine…

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Q: find the voltage on primary side in pu.

A: Given that, Primary Voltage (V1)=2000 V, Secondary Voltage (V2)=200 V, Primary Impedance (Z1)=0.12+…

Q: Equivalent electrical parameter of MMF in electric circuits.  a.   Voltage  b.   Resistance  c.…

A: In this question we will write equivalent electrical parameter of MMF in electric circuits...

Q: Calculate the resistance of an Aluminum wire at 20°C in ohm-circular mils per foot if its…

A: The power system has to transmit power from the generation side to the load side. For this purpose,…

Q: a copper conductor has a resistance of 0.2 ohms at 20°C. if it is found to have a resistance of 0.22…

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Q: (1-1)The length of Copper wire is 10m and its cross-sectional area is 0.5mm² has a Calculate: a) The…

A: given lenth of copper wire is 10 m and its cross sectional area is 0.5 mm2 has resistance of 0.34…

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).