The spiral of an incandescent lamp (220V) is made of fechral wiring with a length of 0.15 meters
| June 15, 2021 | education
The spiral of an incandescent lamp (220V) is made of fechral wiring with a length of 0.15 meters and a cross-sectional area of 0.1 mm ^ 2. Determine the consumed electrical power.
L = 0.15 m.
S = 0.1 mm2.
ρ = 1.3 Ohm * mm2 / m.
U = 220 V.
N -?
N = U ^ 2 / R.
R = ρ * L / S.
N = S * U ^ 2 / ρ * L.
N = 0.1 mm2 * (220 V) ^ 2 / 1.3 Ohm * mm2 / m * 0.15 m = 24820.5 W.
Answer: N = 24820.5 W.
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