a resistor connected to a 1.5 v battery dissipates 1.0 w. if the battery is replaced by a 3.0 v battery, the power will be

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04-11-2022
Physics

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a resistor connected to a 1.5 v battery dissipates 1.0 w. if the battery is replaced by a 3.0 v battery, the power will be

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kjuli1766 kjuli1766 · Answer 1 · 2022-11-08T07:59:07-05:00

The power dissipated in the second case is 2W.

A resistor in a circuit with a voltage drop consumes electrical energy. All resistors have a power rating because this electrical energy is converted to heat energy. This is the maximum power that can be drawn from the resistor without burning out. Resistor energy dissipation. A charge q moves through a resistor, it loses potential energy Vq. where V is the potential drop across the resistor.

calculation:-

V = 1.5

power = 1

VI = P

I = 1/1.5

= 2/3

New V = 3 V

p = VI

= 3×2/3

= 2W.

This energy is dissipated as heat similar to how a ball of putty falling off a cliff converts potential energy into heat when it hits the ground. When current flows through a resistor, electrical energy is converted into heat energy. All heat generated by the components of a circuit has at least some resistance and is dissipated into the air surrounding the component.

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