Electro Magnetic Induction And Alternating Currents Question 111

Question: If an alternating voltage is represented as $ E=141\sin (628,t), $ then the rms value of the voltage and the frequency are respectively [Kerala PET 2005]

Options:

A) $ 141V,,628Hz $

B) $ 100V,,50Hz $

C) $ 100V,,100Hz $

D) $ 141V,100Hz $

Show Answer

Answer:

Correct Answer: C

Solution:

$ E=141\sin (628,t), $ $ E_{rms}=\frac{E_{0}}{\sqrt{2}}=\frac{141}{1.41}=100V $ and $ 2\pi f=628 $

Þ $ f=100Hz $



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