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23 Nov 2019

A household circuit rated at 120 volts is protected by a fuse rated at 15 Amps. What is the maximum number of 100-watt light bulbs which can be lit simultaneously in parallel in this circuit without blowing the fuse? [Hint, find the maximum operating power for this household circuit first.]

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Lelia Lubowitz
Lelia LubowitzLv2
23 Nov 2019
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Hi I need help with this problem:

Some light bulbs are connected in parallel to a 120 V source.Eachbulb dissipates an average power of 60W. The circuit has a fuseFthat burns out when the current in the circuit exceeds 14.9A.Determine the largest number of bulbs, which can be used inthecircuit without burning out the fuse.

A 120 V power line is protected by a 15 A fuse. What is the maximumnumber of light bulbs rated at 120 V and 240 W that can be operatedat full brightness on this line? Note that, on a typical householdcircuit, the bulbs are connected in parallel.

a) 1
b) 2
c) 4
d) 6
e) 7

A number of identical light bulbs are connected in parallel toa120V AC power source. Each bulb dissipates an average powerof 60W.The circuit has a fuse that burns out when thecurrent in thecircuit reaches 9.0 A. What is the maximumnumber of bulbs that canbe added in parallel without burning outthe fuse?

I know that the voltage of 120 is the RMS value, so Vrms =120V
I also know that the average power (Pav), equates to Irms^2 xR
I'm confused as to the current that is given. Should I setthis asthe maximum current? Or would I use it like a rmsvalue?

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