An unknown resistor is connected between the terminals of a 12.0 V battery. Energy is dissipated in the resistor at the rate of 0.630 W. The same resistor is then connected between the terminals of a 10.5 V battery. At what rate is energy now dissipated?

The energy is dissipated in the resistor at the rate of 0.482 W

Explanation:

Given :

Potential difference resistor 12 V

Energy dissipated in the resistor 0.630 W

New potential difference 10.5 V

We know that energy dissipated per unit time through resistor is given by,

⇒    

Rate of energy dissipated is proportional to the square of the applied potential.

So for new potential we can write,

    W

So new rate of energy dissipation is 0.482 W

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explanation: