8. A sinusoidal voltage v = 50sinwt is applied to a series RL circuit. The current in the circuit is given
by I = 25sin (wt-53º). Determine the apparent power (VA),
a)620
O b)625
O 0630
O 01635
Answers
Answered by
0
Answer:
Inductive reactance =X
L
=ωL=2π×50×35×10
−3
=3.5π=11 Ω
P
⇒ϕ=
4
π
RMS current i=
R
2
+X
L
2
V
rms
=
11
2
+11
2
220
i
rms
=
11
2
220
=
2
20
Maximum current I
max
=I
rms
2
=20 A
Current I=I
max
sin(ωt+ϕ)=20sin(ωt+π/4)
In above waveform, Time period, T=2π
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