An electrical bulb is labeled 20W, 240V. Calculate: a) The current through the filament when the bulb works normally b) The resistance of the filament used...

      

An electrical bulb is labeled 20W, 240V. Calculate:
a) The current through the filament when the bulb works normally
b) The resistance of the filament used in the bulb.

  

Answers


Moraa
a) I = P/V = 20/240 = 0.437A
b) R = P/I2 = 20/ 0.4372 = 575.04? or R = V2/P =2402/20 = 576?
Moraa orina answered the question on April 10, 2018 at 17:44


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