NEET Physics Alternating Current Questions Solved

NEET - 2012

The instantaneous values of alternating

current and voltages in a circuit are given

as 

i=12sin(100πt) amperee=12sin(100πt+π/3) volt

The average power in Watts consumed in the

circuit is

(a) 14

(b) 34

(c) 12 

(d) 18

Given equations

            i=12sin(100πt)

and      e=12sin(100πt+π/3)so,   ie=12and Ve=12

We know that average power

          Pav=Vrms×irms cosϕ=12×12×cos60°

                       since, irms=io2and Vrms=Vo2

           =12×12×12=18W

Difficulty Level:

  • 22%
  • 26%
  • 21%
  • 34%
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