Two identical wires one of nichrome and other of copper are connected in series and a current (l) is passed through them. State the changed observed in the temperature of the two wires. Justify your answer. State the law which explains the above observation. (class- X)
Answers
Answer:
You will see that nicrome wire is getting hot earlier than the copper wire because it has higher resistivity than copper so it will convert the electrical energy into heat energy more earlier than copper wire . And the law here applied is called as Joule's Law Of Heating H=I^2×R×T Which states that heat is directly proportional to current,resistance and time
we know that resistance is directly proportional to the temperature. Since, nichrome is an alloy so it has more resistance. Hence , it gets more heated that is why we use nichrome wire in heater for producing more heat to cook food. We know that alloy has more resistance than a metal. so nichrome has more heat produced capacity than copper wire.so copper has less temperature than nicrome.
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