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 $



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