A question about circuits





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Discus: SAT/ACT Tests and Test Preparation: March 2004 Archive: A question about circuits
By Brianktm (Brianktm) on Thursday, March 04, 2004 - 10:36 am: Edit

A bulb is made to be used with a 120-V battery. If it is used with an AC circuit instead with a peak voltage of 120 V, it will burn: brighter, dimmer or with the same brightness.

I am thinking dimmer on this one because some current is lost as it alternates. Am I right in this assumption?

By Foreignboy (Foreignboy) on Thursday, March 04, 2004 - 10:46 am: Edit

Dimmer.

For DC, voltage = 120V.
For AC, peak voltage = 120V, but mean voltage = 120V/1.4142

By Brianktm (Brianktm) on Thursday, March 04, 2004 - 10:52 am: Edit

Thank you


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