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Q.

Two identical wires, one of nichrome and the other of copper, are connected in series, and a current $I$ is passed through them. Which of the following laws explain the fact that nichrome produces more heat?

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a

Right hand thumb rule

b

Joule's law of heating

c

Ohm's law

d

All of the above

answer is C.

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Detailed Solution

Joule's law of heating explains the fact that nichrome produces more heat.
A huge amount of heat is produced in nichrome wire for the same current as compared to that of the copper wire due to the high resistivity of nichrome. Therefore, the higher temperature change is also observed in the nichrome wire with the rise in the temperature and an increase in the amount of flow of current.

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