A No. 14 AWG standard annealed copper wire is 0.003 23 in? in cross section and has a resistance of 2.58 m2/ft at 25°C. What is the resistance of 500 ft of No. 6 AWG wire of the same material at 25°C? The cross-sectional area of this wire is 0.0206 in?.

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

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Q: An aluminium rod with square cross section is 1.3 m long and 3.8 mm on edge (1) What is the…

A: Given Data: l=1.3mArea of the corss section = (3.8mm)2=14.44*10-6 m2ρ(AL) = 2.75 *10-8ρ(cu) = 1.69 *…

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: Calculate the electrical conductivity of pure platinum at -200oC. data: resistivity of Pt a Tamb =…

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Q: An aluminum wire 7.5 m long is connected in parallel with a copper wire 6 m long. When a current of…

A: It is Given that: Length of alminium wire LA=7.5mLength of copper wire LC=6mTotal current=5ACurrent…

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).