Inductor A charged capacitor connected to an inductor causes a current to flow through the inductor until the capacitor is fully discharged. The nductor, in turn, charges up the capacitor until the capacitor is fully charged again. If Q(t) is the charge on the capacitor at time t, an Chen 1 = dQ dt f the circuit resistance is zero, then the charge Q and the current I in the circuit satisfy the differential equation dl + dt = 0, C where C is the capacitance and L is the inductance, so L 20 = 0.
Inductor A charged capacitor connected to an inductor causes a current to flow through the inductor until the capacitor is fully discharged. The nductor, in turn, charges up the capacitor until the capacitor is fully charged again. If Q(t) is the charge on the capacitor at time t, an Chen 1 = dQ dt f the circuit resistance is zero, then the charge Q and the current I in the circuit satisfy the differential equation dl + dt = 0, C where C is the capacitance and L is the inductance, so L 20 = 0.
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![his problem concerns the electric circuit shown in the figure below.
Capacitor
Resistor
Inductor
www
A charged capacitor connected to an inductor causes a current to flow through the inductor until the capacitor is fully discharged. The current in the
inductor, in turn, charges up the capacitor until the capacitor is fully charged again. If Q(t) is the charge on the capacitor at time t, and I is the current,
then
I =
dQ
dt
If the circuit resistance is zero, then the charge Q and the current / in the circuit satisfy the differential equation
dI
L + = 0,
dt
where C is the capacitance and L is the inductance, so
L
d² Q
dt2
+
= 0.
Then, just as as a spring can have a damping force which affects its motion, so can a circuit; this is introduced by the resistor, so that if the resistance of
the resistor is R,
d² Q
L
+ R
dt²
dQ
dt
1
+
=
= 0.
If L = 1 henry, R = ohm, and C = 9 farads, find a formula for the charge when
(a) Q(0) = 0 and Q'(0) = 2:
Q(t) =
(b) Q(0)
= 2 and Q'(0) = 0:
Q(t) =](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F13727128-5fa0-49d1-9916-83b76cfadd30%2F4185edfc-c7db-472a-a67f-3872c706f8c3%2F7gyfpjm_processed.jpeg&w=3840&q=75)
Transcribed Image Text:his problem concerns the electric circuit shown in the figure below.
Capacitor
Resistor
Inductor
www
A charged capacitor connected to an inductor causes a current to flow through the inductor until the capacitor is fully discharged. The current in the
inductor, in turn, charges up the capacitor until the capacitor is fully charged again. If Q(t) is the charge on the capacitor at time t, and I is the current,
then
I =
dQ
dt
If the circuit resistance is zero, then the charge Q and the current / in the circuit satisfy the differential equation
dI
L + = 0,
dt
where C is the capacitance and L is the inductance, so
L
d² Q
dt2
+
= 0.
Then, just as as a spring can have a damping force which affects its motion, so can a circuit; this is introduced by the resistor, so that if the resistance of
the resistor is R,
d² Q
L
+ R
dt²
dQ
dt
1
+
=
= 0.
If L = 1 henry, R = ohm, and C = 9 farads, find a formula for the charge when
(a) Q(0) = 0 and Q'(0) = 2:
Q(t) =
(b) Q(0)
= 2 and Q'(0) = 0:
Q(t) =
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