Electro Magnetic Induction And Alternating Currents Question 27
Question: An alternating current source of frequency 100 Hz is joined to a combination of a resistance, a capacitance and a coil in series. The potential difference across the coil, the resistance and the capacitor is 46, 8 and 40 volt respectively. The electromotive force of alternating current source in volt is [MP PET 1995]
Options:
A) 94
B) 14
C) 10
D) 76
Show Answer
Answer:
Correct Answer: C
Solution:
$ V_{L}=46,volts, $
$ V_{C}=40,volts $ ,
$ V_{R}=8,volts $
E.M.F. of source $ V=\sqrt{8^{2}+{{(46-40)}^{2}}}=10,volts $
