In Fig. 30.11, suppose that ε = 60.0 V, R = 240 Ω, and L = 0.160 H. With switch S2 open, switch S1, is left closed until a constant current is established. Then S2 is closed and S1 opened, taking the battery out of the circuit. (a) What is the initial current in the resistor, just after S2 is closed and S1 is opened? (b) What is the current in the resistor at t = 4.00 × 10−4 s? (c) What is the potential difference between points b and c at t = 4.00 × 10−4 s? Which point is at a higher potential? (d) How long does it take the current to decrease to half its initial value?
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- For the circuit shown below, =20V , L = 4.0 mH, and R = 5.0 . After steady state is reached with S1 closed and S2 open, S2 is closed and immediately thereafter (at t = 0) S1 is opened. Determine (a) the current through L at t = 0, (b) the current through L at r = 4.0 x 10-4 s, and (c) the voltages across L and R at t = 4.0 x 10-4 s.arrow_forwardA charged capacitor of C=45.0 μF is connected to a resistor of R=2.8 MΩ as shown in the figure. The switch S is closed at time t=0. Find the time (in seconds) it takes the current to fall to 0.25 of its initial value.arrow_forwardIn the circuit of the figure & = 1.70 kV, C = 9.50 µF. R = R2 = R3 = 0.750 MQ. With C completely uncharged, switch S is suddenly closed (at t = 0). At t = 0. what are (a) current i, in resistor 1. (b) current iz in resistor 2, and (c) current ig in resistor 3? At t = (that is, after many time constants). what are (d)in. (e)i2, and (f)i3? What is the potential difference V2 across resistor 2 at (g)t = 0 and (h)t = ? R (a) Number Units (b) Number Units (c) Number Units Units (d) Number Units (e) Number Units (f) Number Units 主 (g) Number Units (h) Number >arrow_forward
- When the switch S is toggled to the left, the capacitor C charges through the resistor R. When the switch is toggled to the right, the capacitor discharges current through the patient's torso, modeled as the resistor Rtorso, allowing the heart's normal rhythm to be reestablished. (a)If the capacitor is initially uncharged with C = 8.25 µF and = 1270 V, find the value of R (in ohms) required to charge the capacitor to a voltage of 755 V in 1.70 s. answer in Ω b) If the capacitor is then discharged across the patient's torso with Rtorso = 1260 Ω, calculate the voltage (in V) across the capacitor after 4.50 ms. answer in Varrow_forwardThe battery terminal voltage in the figure below is E = 8.30 V and the current I reaches half its maximum value of 5.00 A at t = 0.200 s after the switch is closed. HINT S + E S Apply the expression for the current in an RL circuit. V R (a) Calculate the time constant 7 (in s). V ele Click the hint button again to remove this hint. (b) What is the potential difference (in V) across the inductor at t = 0.200 s? (c) What is the potential difference (in V) across the inductor in the instant after the switch is closed at t = 0?arrow_forwardWhen the switch S is toggled to the left, the capacitor C charges through the resistor R. When the switch is toggled to the right, the capacitor discharges current through the patient's torso, modeled as the resistor Rtorso, allowing the heart's normal rhythm to be reestablished. HINT (a) If the capacitor is initially uncharged with C = 8.50 µF and = 1260 V, find the value of R (in ohms) required to charge the capacitor to a voltage of 755 V in 1.30 s. Ω (b) If the capacitor is then discharged across the patient's torso with Rtorso = 1270 Ω, calculate the voltage (in V) across the capacitor after 4.50 ms. Varrow_forward
- When the switch S is toggled to the left, the capacitor C charges through the resistor R. When the switch is toggled to the right, the capacitor discharges current through the patient's torso, modeled as the resistor Rtorso, allowing the heart's normal rhythm to be reestablished. (a) If the capacitor is initially uncharged with C = 7.00 µF and = 1270 V, find the value of R (in ohms) required to charge the capacitor to a voltage of 795 V in 1.70 s. Ω (b) If the capacitor is then discharged across the patient's torso with Rtorso = 1270 Ω, calculate the voltage (in V) across the capacitor after 4.50 ms.arrow_forwardChapter 30, Problem 054 In the figure, ε = 118 V, R₁ = 14.9 №, R₂ = 21.3 N, R3 = 35.8 №, and L= 1.90 H. Immediately after switch S is closed, what are (a) i₁ and (b) i₂? (Let currents in the indicated directions have positive values and currents in the opposite directions have negative values.) A long time later, what are (c) ₁ and (d) i2? The switch is then reopened. Just then, what are (e) ₁ and (f) i₂? A long time later, what are (g) ₁ and (h) i₂? www R₁ R$ R₂ Larrow_forwardIn the shown circuit, the capacitor is initially uncharged. The switch S is closed at time t=0. Find the current in the circuit (in µA) when the charge on the capacitor is 7.5 µC. 10 V 2.0uF 0 05 MO «k Question 2 of 12arrow_forward
- (A) The switch S, is closed for a long time in the circuit shown. Then, S, is opened and Sz is closed simultaneously. What is the maximum charge that can be stored in E the capacitor? E = 30 V, L = 4 mH, R = 5 Q, C = 6 µF L R 0.93 mc 0.65 C 0.65 mc 0.93 C 0.35 C 0.35 mc O None of themarrow_forward(a) In the figure what value must R have if the current in the circuit is to be 1.3 mA? Take ₁ = 2.7 V, 8₂ = 5.3 V, and r₁= r₂ = 3.9 Q. (b) What is the rate at which thermal energy appears in R? ww www. (b) Number 12₂ (a) Number 1992.2 i 2.6 Units Units Ω W <arrow_forwardConsider the circuit shown in the figure, with =36.0 V,R, =50.02,R=1502 and L= 4.00 H. (a) Switch S, is closed. Just after S. is closed, what are the current i, through R, and the potential differences V and Va ? AC (b) After S. has been closed a long time so that the current has reached its final, steady value, what are i, . VAc and Ve ? (c) Find the expressions for i, , Vac and Ve as functions of time since S, was closed. Do your results agree with what you get in (a) and (b) ? Graph i, . Vsc and Ve as a function oftime. Ro L Aarrow_forward
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning