I = 24/8 = 3A = Lamp current.
Vr = 117-24 = 93 V. = Voltage across the
resistor.
R = Vr/I = 93/3 = 31 Ohms.
A 24V lamp has a resistance of 8.0 ohms. What resistance must be placed in series with the lamp if it is to be used in a 117V line?
I think I understand how resistors work but this HW question is completely over my head..
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