Arod of 2.0-m length and a square (2.0 mm x 2.0 mm) cross section is made of a material with a resistivity of 6.0 x 10^-8 0.ω.m. if a potential difference of 0.50 v is placed across the ends of the rod, at what rate is heat generated in the rod?

Heat generated in the rod is 8.33 watts.

Explanation:

It is given that,

Length of rod, l = 2 m

Area of cross section,

Resistivity of rod,

Potential difference, V = 0.5 V

The value of resistance is given by :

R = 0.03 ohms

Let H is the rate at which heat is generated in the rod . It is given by :

Since,

So, the at which heat is generated in the rod is 8.33 watts. Hence, this is the required solution.

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