A lightbulb is in series with a 2.0 resistor. The lightbulb dissipates 10 W when this

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A lightbulb is in series with a 2.0 Ω resistor. The lightbulb dissipates 10 W when this series circuit is connected to a 9.0 V battery. What is the current through the lightbulb? There are two possible answers; give both of them.

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