Question

10. Tom made a series RLC circuit as shown in Figure 5. Then he connected the circuit to a signal generator and applied a 5 V (peak amplitude) sinusoidal voltage which he observed using channel 1 of an oscilloscope. The resistor was 10 ?. Then he calculated the reactances of L and C for the frequency chosen and found them to be $X_L = 20\Omega$ and $X_C = 10\Omega$. Then he connected the channel 2 probes across the inductor as shown in the figure. The negative end of the two oscilloscope channels are internally connected to the common ground. Oscilloscope Channel 1 $V_s(t)$ R Oscilloscope L $V_L(t)$ Channel 2 C Figure 5: Question 10 He measured the amplitude of $V_L(t)$ as well as its phase shift with respect to the source voltage $V_s(t)$. Which of the following four phasor diagrams does represent these voltages correctly? $V_L = 7\angle0.25\pi$ $V_L = 4.5\angle0.15\pi$ $V_L = 4.5\angle0.5\pi$ $V_s = 5\angle0$ $V_s = 5\angle0$ $V_s = 5\angle0$ $V_s = 5\angle0$ (a) (b) $V_L = 4.5\angle-0.15\pi$ (c) (d)

          10. Tom made a series RLC circuit as shown in Figure 5. Then he connected the
circuit to a signal generator and applied a 5 V (peak amplitude) sinusoidal voltage
which he observed using channel 1 of an oscilloscope. The resistor was 10 ?. Then
he calculated the reactances of L and C for the frequency chosen and found them
to be $X_L = 20\Omega$ and $X_C = 10\Omega$. Then he connected the channel 2 probes across
the inductor as shown in the figure. The negative end of the two oscilloscope
channels are internally connected to the common ground.
Oscilloscope
Channel 1
$V_s(t)$
R
Oscilloscope
L $V_L(t)$ Channel 2
C
Figure 5: Question 10
He measured the amplitude of $V_L(t)$ as well as its phase shift with respect to the
source voltage $V_s(t)$. Which of the following four phasor diagrams does represent
these voltages correctly?
$V_L = 7\angle0.25\pi$
$V_L = 4.5\angle0.15\pi$
$V_L = 4.5\angle0.5\pi$
$V_s = 5\angle0$
$V_s = 5\angle0$
$V_s = 5\angle0$
$V_s = 5\angle0$
(a)
(b)
$V_L = 4.5\angle-0.15\pi$
(c)
(d)

10. Tom made a series RLC circuit as shown in Figure 5. Then he connected the
circuit to a signal generator and applied a 5 V (peak amplitude) sinusoidal voltage
which he observed using channel 1 of an oscilloscope. The resistor was 10 ?. Then
he calculated the reactances of L and C for the frequency chosen and found them
to be XL = 20Ω and XC = 10Ω. Then he connected the channel 2 probes across
the inductor as shown in the figure. The negative end of the two oscilloscope
channels are internally connected to the common ground.
Oscilloscope
Channel 1
Vs(t)
R
Oscilloscope
L VL(t) Channel 2
C
Figure 5: Question 10
He measured the amplitude of VL(t) as well as its phase shift with respect to the
source voltage Vs(t). Which of the following four phasor diagrams does represent
these voltages correctly?
VL = 7∠0.25π
VL = 4.5∠0.15π
VL = 4.5∠0.5π
Vs = 5∠0
Vs = 5∠0
Vs = 5∠0
Vs = 5∠0
(a)
(b)
VL = 4.5∠-0.15π
(c)
(d)

Added by Christina J.

Question

Please give Ace some feedback