The 100-bulb strand of incandescent Christmas lights is rated at 40.8W of power. When stacked, two strands consume twice the power (81.6W =2 x 40.8W) and act as two resistors in parallel to a 120V source. If the 120V source is safe guarded by a 15A circuit breaker, and the 15A circuit breaker will actually "trip" (open up) at 80% its rating (which is often the case in the real world!), how many strands can be run at the same time without tripping the circuit breaker? If you use 100-bulb strands of LED Christmas lights instead, how many strands can you run at the same time? Assume LEDs run at 1/10th the power of incandescent bulbs.
Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
The 100-bulb strand of incandescent Christmas lights is rated at 40.8W of power. When stacked, two strands consume twice the power (81.6W =2 x 40.8W) and act as two resistors in parallel to a 120V source. If the 120V source is safe guarded by a 15A circuit breaker, and the 15A circuit breaker will actually "trip" (open up) at 80% its rating (which is often the case in the real world!), how many strands can be run at the same time without tripping the circuit breaker? If you use 100-bulb strands of LED Christmas lights instead, how many strands can you run at the same time? Assume LEDs run at 1/10th the power of incandescent bulbs.
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