Question

Express Joule's law of heating mathematically. What is the resistance of 12 m wire having radius 2 × 10–4 m

and specific resistivity 3.14 × 10–8 Wm?​

Answer 1

Answer:

ANSWER

According to the Joule's law, when a current is passed through a conductor for a certain time, the conductor gets heated up and the amount of heat is given by :

H=i

2

Rt

H is the heat, i is the current, R is the resistance and t is the time.

Explanation:

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Answer 2

Answer:

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