Question

Does ohm's law hold good for a copper wire??

Answer 1

Answer:

yah it's ok

it hold good

Explanation:

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Answer 2

Copper does a pretty good job of obeying Ohm’s Law if the temperature is kept constant and power dissipation is low. A polynomial should be used to calculate resistance as a function of temperature as the temperature begins to deviate from ambient.

Here is the equation for a copper RTD for the temperature range of -50 °C to 150 °C; a copper wire would be very similar, if not identical:

Rₜ = R₀(1 +A₂t)

where

R₀ = resistance at 0 °C (Ω)

A₂ = 4.2743 x 10⁻³ (°C⁻¹)

t = temperature (°C)

Rₜ = resistance at temperature t (Ω)

A higher order polynomial is used when the temperature is less than -50 °C or greater than 150 °C

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