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?
Learn your wayIncludes step-by-step video
Chapter 30 Solutions
University Physics with Modern Physics (14th Edition)
Additional Science Textbook Solutions
Physics for Scientists and Engineers with Modern Physics
College Physics (10th Edition)
Sears And Zemansky's University Physics With Modern Physics
Essential University Physics: Volume 1 (3rd Edition)
Applied Physics (11th Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
- 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_forwardFor a long period of time the switch S in position "b". At t = 0 s, the switch Si moved from position "b" to position "a". 1 ΜΩ www 3 ΜΩ www 11 V 4 μF Sb Find the voltage across the 1 MN center-left resistor at time t₁ = 3 s. Answer in units of V. Much later, at some time to = 0s, the switch is moved from position "a" to position "b". Find the voltage across the 1 MS center-left resistor at time t' = 1.3 s. Answer in units of V.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. (a) If the capacitor is initially uncharged with C = 7.75 µF and = 1220 V, find the value of R (in ohms) required to charge the capacitor to a voltage of 765 V in 1.70 s. Ω (b) If the capacitor is then discharged across the patient's torso with Rtorso = 1230 Ω, calculate the voltage (in V) across the capacitor after 5.50 ms.arrow_forward
- The 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. (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_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_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. 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_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. (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_forwardIn the figure, 8 = 149 V, R₁ = 12.10, R₂ =29.70, R3 = 28.8 2, and L = 1.97 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) i₁ and (d) i2? The switch is then reopened. Just then, what are (e) i₁ and (f) i2? A long time later, what are (g) i₁ and (h) i₂? (a) Number i (b) Number (c) Number i (d) Number i Units Units Units Units 8 iz↓ > R₂ R₁₂arrow_forward
- A charged capacitor of C=38.0 µF is connected to a resistor of R=2.8 MQ 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. R wwwarrow_forwardInthe circuit of the figure & = 1.83 kV, C = 7.20 µF, R1 = R2 = R3= 1.02 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 iz in resistor 3? At t = 00 (that is, after many time constants), what are (d)i,, (e)i2, and (f)i3? What is the potential difference V2 across resistor 2 at (g)t = 0 and (h)t = 0o? R (a) Number i Units (b) Number i Units (c) Number i Units (d) Number i Units (e) Number i Units (f) Number i Unitsarrow_forwardRAŽ ŽRB Rc RD ɛ = 12 V, RA = 5 Q, RB = 3 2, Rc = 1 Q, and Rp = 3 2. The switch is open. a) What is the battery current? (include units) b) What is the difference in electric potential between points a and b? (include units) c) The switch is closed. What is the battery current? (include units) d) The switch is closed. What is the difference in electric potential between points a and b? (include units)arrow_forward
- College PhysicsPhysicsISBN:9781285737027Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning