Electro Magnetic Induction And Alternating Currents Question 81
Question: If instantaneous current is given by $ i=4\cos ,(\omega ,t+\varphi ) $ amperes, then the r.m.s. value of current is [RPET 2000]
Options:
A) 4 amperes
B) $ 2\sqrt{2} $ amperes
C) $ 4\sqrt{2} $ amperes
D) Zero amperes
Show Answer
Answer:
Correct Answer: B
Solution:
$ {i_{r.m.s.}}=\frac{i_{o}}{\sqrt{2}}=\frac{4}{\sqrt{2}}=2\sqrt{2}\ ampere $
