Question

The resistivity of metals is a constant quantity prove it.​

Answer 1

Explanation:

Forts and coins are a very important and accurate source of history. The forts for example: Tell is what were the building materials of that time. They also depict the architectural style of that particular period of time. On the other hand, coins usually had the face of the king during whose reign it was made and was in use. They also tell about the metals used during the time period and if not the ruler’s face then it had an important symbol usually related to the people’s religion or culture which also helps us better understand the cultural and religious diversity of that period of time.

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Answer 2

Answer:

The temperature of the material affects resistivity.

Explanation:

• We can apply Ohm's Law, which stipulates that the resistance will be constant, and assume that the resistivity is constant at a constant temperature. This is presuming that the current is not too strong to severely heat the material.
• However, resistance is a constant. If you alter the resistance and conductor length, measure the resistance experimentally, and then plug the results into the formula, you'll discover that the resistivity has remained constant for all possible values of A and L because R is appropriately altered to maintain resistivity constant.
• The resistance offered per unit length and per unit cross-sectional area is the material's particular resistance. It is a fixed value that is equal to the material's resistivity.

Thus, metals' resistivity is a constant value.

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