A 15 Watt desk-type fluorescent lamp has an effective resistance of 200 ohms when operating (note: the 15 Watts is only associated with the lamp). It is in series with ballast that has a resistance of 80 ohms and an inductance of .9H. The lamp and ballast are operated at 120V, 60HZ. Draw the circuit Calculate the power drawn by the lamp (hint: for R use the sum of both
a. resistances)
b. Calculate the apparent power
c. Calculate the power factor
d. Calculate the reactive power Calculate the size of the capacitor necessary to provide unity power factor
Answers: 2
Physics, 22.06.2019 09:20, Geo777
Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers
Answers: 1
Physics, 22.06.2019 14:10, chuchi24
The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).
Answers: 3
A 15 Watt desk-type fluorescent lamp has an effective resistance of 200 ohms when operating (note: t...
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