Bulbs can fail without blowing the fuse - electricity, Physics

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A holiday light string of ten bulbs is equipped with shunts that short out the bulbs when the voltage drop increases to line voltage, which happens when a bulb burns out. Every bulb has a resistance of 200.0).

The string is linked to a household circuit at 120.0 V.

If the string is protected by a 250.0-mA fuse, how many bulbs can fail without blowing the fuse?

 


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