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31 Oct 2021
Given information
It is given that the extension cord of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 2.7 m is connected to an electric heater which draws 18.0 A on a 120V line. It is also known that the resistivity of copper is
Step-by-step explanation
Step 1.
The power consumption by a resistor is given as,
Area with diameter,(d ) is
The resistance (R) of a resistor is related with the resistivity of it’s material (ρ), it’s length (l) and the cross-sectional area (A) as,
Where, d is the diameter of the resistor.
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