Question

What is the molecular formula of electric current and heat\energy not glucose?
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Answer 1

When an electric current is passed through a conductor, the conductor becomes hot after some time and produces heat. This happens due to the conversion of some amount of electric energy, passing through the conductor, into heat energy. This effect of electric current is called heating effect of electric current.
The heating effect of electric current depends on three factors:
The resistance, R of the conductor. A higher resistance produces more heat
The time, t for which current flows. The longer the time the larger the amount of heat produced
The amount of current, I. the higher the current the larger the amount of heat generated
Heating effect of electric current I, through a conductor of resistance, R for a time, t is given by H = I2Rt. This equation is called the Joule’s equation of electrical heating. It quantifies the heating effect of electric current





Derivation: Joule’s Equation of Electric Heating
To calculate the heat produced in a conductor, consider current I is flowing through a conductor AB of resistance R for time t. also consider that the potential difference applied across its two ends is V.
Now, total amount of work done in moving a charge q from point A to B is given by:
W = q X V (1)
Now, we know that charge = current × time
or q = I X t
and V = I X R (Ohm’s law)
Putting the values of q and V in equation (1), we get
W = (I X t) X (I X R)
Or W = I2Rt
Now, assuming that all the work done is converted into heat energy we can replace symbol of ‘work done’ with that of ‘heat produced’. So,
H = I2RT