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 $
