Voltage Zero Point
Electricity and Magnetism
Level
3
If the voltage difference between the two green dots in the AC circuit is zero, determine .
The answer is 7.2.
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1 solution
We have a+bj+0.3(3+5j)=(1-0.3)(3+5j)+1+3j, or a+bj=2.2+5j. Therefore a=2.2 and b=5, and hence a+b=7.2