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Sagot :
Electrical resistivity is the measure of the material that can resist the electrical charge. The resistance of the copper wire at 80°C will be 146.43 Ω. Thus, option E is correct.
What is resistance?
Electrical resistance is defined as the opposing force that counteracts the electrical charge flow in the material. It is expressed in the terms of the ohms (Ω).
Resistance is calculated as,
R₈₀ = R₀(1 + αΔT)
Given,
Temperature coefficient of resistance (α) = 0.0068 °C⁻¹
ΔT = 60°C
Resistance of a wire (R₀) at 20° C = 104 Ω
Resistance of a wire (R₈₀) at 80°C =?
Substituting values above:
R₈₀ = (104 )[1 + (0.0068)(60)]
R₈₀ = 146.43 Ω
Therefore, option E. 146.43 Ω is the resistance of the copper wire at 80°C.
Learn more about resistance here:
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Your question is incomplete, but most probably your full question was, The temperature coefficient of resistivity for copper is 0.0068 °C⁻¹. If a copper wire has a resistance of 104 Ω at 20°C, what is its resistance at 80°C?
- 112.64 Ω
- 98.56 Ω
- 84.48 Ω
- 70.40 Ω
- 146.43 Ω
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