Suppose a circuit contains an electromotive force (a battery) that produces a voltage of E(t) volts (V), a capacitor with a capacitance of C farads (F), and a resistor with a resistance of R ohms (2). The voltage drop across the capacitor is where Q is the charge (in coulombs), so in this case Kirchhoff's Law gives Q = E(t). C RI + dQ we have dt 1 Since I = OP GQ = E(t). dt Suppose the resistance is 102, the capacitance is 0.1F, a battery gives a constant voltage of 40V, and the initial charge is Q(0) = 0 coulombs. Find the charge and the current at time t. Q(t) = I(t) =

Calculus: Early Transcendentals
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Chapter1: Functions And Models
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Suppose a circuit contains an electromotive force (a battery) that produces a voltage of E(t) volts (V), a
capacitor with a capacitance of
farads (F), and a resistor with a resistance of R ohms (2). The voltage
drop across the capacitor is
Q
where Q is the charge (in coulombs), so in this case Kirchhoff's Law gives
Q
* = E(t).
RI +
C
dQ
we have
dt
Since I
dQ
R-
Q = E(t).
+
dt
Suppose the resistance is 102, the capacitance is 0.1F, a battery gives a constant voltage of 40V, and the
initial charge is Q(0) = 0 coulombs.
Find the charge and the current at time t.
Q(t) =
I(t)
||
Transcribed Image Text:Suppose a circuit contains an electromotive force (a battery) that produces a voltage of E(t) volts (V), a capacitor with a capacitance of farads (F), and a resistor with a resistance of R ohms (2). The voltage drop across the capacitor is Q where Q is the charge (in coulombs), so in this case Kirchhoff's Law gives Q * = E(t). RI + C dQ we have dt Since I dQ R- Q = E(t). + dt Suppose the resistance is 102, the capacitance is 0.1F, a battery gives a constant voltage of 40V, and the initial charge is Q(0) = 0 coulombs. Find the charge and the current at time t. Q(t) = I(t) ||
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