# An electric metal melting furnace consumes 800 A at a voltage of 60 V. How much heat is generated

August 30, 2021 | education

| **An electric metal melting furnace consumes 800 A at a voltage of 60 V. How much heat is generated in the furnace in 1 minute?**

The amount of heat is determined by the formula

Q = I ^ 2 * R * T,

where

I is the consumed current;

R – resistance;

T is time.

Expressing resistance in terms of current and voltage

R = U / I.

Substitute the heat into the formula and find the desired

Q = I² * (U / I) * T;

Q = I * U * T;

Q = 800 * 60 * 1 * 60 = 2,880,000 J = 2.88 MJ.

Answer: 2.88 MJ.

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