OpenStudy (anonymous):
suppose we have two sinusoidal voltages of the same frequency with rms values of 10v and 7v, respectively. The phase angles are unknown. What is the smallest rms value that the sum of these voltages could have? The largest? Justify your answers.
OpenStudy (anonymous):
The answer is 17v and 3 v. But i thought it would be 17v and -17v. Its an easy question. just don't see the logic
OpenStudy (vincent-lyon.fr):
Check the definition of rms voltage. Obviously what you have in mind is wrong because -17V is not acceptable.
OpenStudy (ash2326):
@jadefalcon we have two sinusoidal voltages of 10 and 7 volt rms We don't know anything about their phase, If they are added, max voltage will occur when they are in same Phase, minimum will occur when they are are of opposite phase( i.e they have a phase difference of 180 degrees) |dw:1338117480959:dw|
Join our real-time social learning platform and learn together with your friends!
mhuitt9:
Mr. Jones asks his students to generate the next two numbers in the sequence beginning u20135.
Bibian:
if two lines intersect, then exactly line plane contains both lines
iosangel:
Freezing point is considered a _________ physical property because ____________. Intensive, it does depend on how much matter is present.
iosangel:
You are measuring the effects of salt on water's ability to freeze. To one of your water samples, you add sodium chloride (NaCl, or salt).
mekede:
The heat of vaporization of carbon tetrachloride (CCl4) is 197.8 J/g. How much energy is absorbed by 1.
iosangel:
am i correct? Match the following properties with the type of property they are (chemical or physical) or the type of change the substance is undergoing (ch
