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Problem: Two 75.0 W (120 V) lightbulbs are wired in series, then the combination is connected to a 230 V supply. How much power is dissipated by each bulb?

FREE Expert Solution

Power:

P=i2R, where i is current and R is equivalent resistance, in this case. 

Resistance of a bulb can be expressed as:

R=V2P, where V is voltage and P is power.

For resistors connected in series:

Req=R1+R2+...+Rn

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Problem Details

Two 75.0 W (120 V) lightbulbs are wired in series, then the combination is connected to a 230 V supply. How much power is dissipated by each bulb?

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