and 64. *55 Figure 31-32 shows an ac generator connected to a "black box" through a pair of terminals. The box contains an RLC circuit, possibly even a g0) multiloop circuit, whose ele- ments and connections we do i() Fig. 31-32 Problem 55. not know. Measurements out- side the box reveal that E(1) = (75.0 V) sin wt !! and i(1) = (1.20 A) sin(wt + 42.0°).

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*55 Figure 31-32 shows an
ac generator connected to a
"black box" through a pair of
terminals. The box contains an
and 64.
i()
RLC circuit, possibly even a
multiloop circuit, whose ele-
ments and connections we do
E(1)
Fig. 31-32 Problem 55.
not know. Measurements out-
side the box reveal that
E(1) = (75.0 V) sin wt
!!
and
i(t) = (1.20 A) sin(wt + 42.0°).
Transcribed Image Text:*55 Figure 31-32 shows an ac generator connected to a "black box" through a pair of terminals. The box contains an and 64. i() RLC circuit, possibly even a multiloop circuit, whose ele- ments and connections we do E(1) Fig. 31-32 Problem 55. not know. Measurements out- side the box reveal that E(1) = (75.0 V) sin wt !! and i(t) = (1.20 A) sin(wt + 42.0°).
(a) What is the power factor? (b) Does the current lead or lag
the emf? (c) Is the circuit in the box largely inductive or
largely capacitive? (d) Is the circuit in the box in resonance?
(e) Must there be a capacitor in the box? (f) An inductor? (g)
A resistor? (h) At what average rate is energy delivered to
the box by the generator? (i) Why don't you need to know
w, to answer all these questions? SSM www
Transcribed Image Text:(a) What is the power factor? (b) Does the current lead or lag the emf? (c) Is the circuit in the box largely inductive or largely capacitive? (d) Is the circuit in the box in resonance? (e) Must there be a capacitor in the box? (f) An inductor? (g) A resistor? (h) At what average rate is energy delivered to the box by the generator? (i) Why don't you need to know w, to answer all these questions? SSM www
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