Electro Magnetic Induction And Alternating Currents Question 81

Question: If instantaneous current is given by i=4cos,(ω,t+φ) amperes, then the r.m.s. value of current is [RPET 2000]

Options:

A) 4 amperes

B) 22 amperes

C) 42 amperes

D) Zero amperes

Show Answer

Answer:

Correct Answer: B

Solution:

ir.m.s.=io2=42=22 ampere



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