Homework Help: physics

Posted by Anonymous on Tuesday, October 11, 2011 at 10:19pm.

A string of 29 identical Christmas tree lights
are connected in series to a 120 V source. The
string dissipates 65 W.
What is the equivalent resistance of the
light string?
Answer in units of Ω

physics - drwls, Wednesday, October 12, 2011 at 2:28am
Power = 65 W = V^2/R
V = 120 V

where R is the resistance of the string. Solve for it

The number of lights is not needed.
physics - Thayer, Wednesday, April 3, 2013 at 12:24pm
205.7142857 ohms

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