A light bulb manufactured for sale in the United States is taken to Europe, wher

Question

A light bulb manufactured for sale in the United States is taken to Europe, where the voltage in the consumer electric power grid is twice that of the voltage in the United States. If this light bulb is connected to the European electric power grid, it will

Select the best answer.

Select the best answer.

be equally bright as in the United States.

be twice as bright as in the United States.

be four times as bright as in the United States.

produce no light at all.

be equally bright as in the United States.

be twice as bright as in the United States.

be four times as bright as in the United States.

produce no light at all.

Explanation / Answer

since power = voltage^2 / resistance

since voltage is doubles and resistance is same

so new power = (2 * voltage)^2 / resistance

new power = 4 * power

so,

in europe this light bult will be four times as bright as in the united state

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