University Physics (14th Edition)
14th Edition
ISBN: 9780133969290
Author: Hugh D. Young, Roger A. Freedman
Publisher: PEARSON
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Chapter 30, Problem Q30.13DQ
To determine
An explanation to describe the voltage is changes suddenly but the current is does not change when the switch S 1
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In the R-L circuit shown in Fig. when switch S1 is closed, the potential vac changes suddenly and discontinuously, but the current does not. Explain why the voltage can change suddenly but the current can’t.
Problem 6: An RL circuit is shown on the right. L
2.4 H. R
49 Ω.e
7.5 V
Part (a) Switch A is closed at t- 0. Express the current I in the circuit as a function
of time in terms of L, R, and ε.
tR
I(t)1-e L)
Correct!
Part (b) What's the direction of the current I, counterclockwise or clockwise'?
Counterclockwise
Correct!
Part (c) Calculate the numerical value of 1 at t 0.1 s in amperes.
Part (d) Calculate the numerical value of 1 at t-L/R s in amperes.
A Part (e) Calculate the numerical value of I, in amperes, when t goes to infinity
Part (f) After a long time, when the current reaches its steady value, open switch A
and close switch B at the same time. Count this moment as t-0. Express the current in the
circuit, I, as a function of time in terms of L, R, and e.
-tR
IL
V Correct!
Part (g) Now what is the direction of the current I, counter-clockwise or clockwise?
Counterclockwise. VCorrect!
Part (h) Calculate the numerical value of 1 at t 0.1 s in amperes.
Part (i) Calculate the…
A 7.50 nF capacitor is charged to 12.0 V, then disconnectedfrom the power supply and connected in series through a coil. The periodof oscillation of the circuit is then measured to be 8.60 * 10^-5 s.Calculate:the maximum current in the circuit
Chapter 30 Solutions
University Physics (14th Edition)
Ch. 30 - In an electric trolley or bus system, the vehicles...Ch. 30 - From Eq. (30.5) 1 H = 1 Wb/A. and from Eqs. (30.4)...Ch. 30 - Prob. Q30.3DQCh. 30 - Prob. Q30.4DQCh. 30 - Prob. Q30.5DQCh. 30 - Two closely wound circular coils have the same...Ch. 30 - Prob. Q30.7DQCh. 30 - For the same magnetic field strength B, is the...Ch. 30 - Prob. Q30.9DQCh. 30 - A Differentiating Circuit. The current in a...
Ch. 30 - In Section 30.5 Kirchhoffs loop rule is applied to...Ch. 30 - Prob. Q30.12DQCh. 30 - Prob. Q30.13DQCh. 30 - In the R-L circuit shown in Fig. 30.11, is the...Ch. 30 - Prob. Q30.15DQCh. 30 - In an L-R-C series circuit, what criteria could be...Ch. 30 - Prob. 30.1ECh. 30 - Prob. 30.2ECh. 30 - Prob. 30.3ECh. 30 - Prob. 30.4ECh. 30 - Prob. 30.5ECh. 30 - Prob. 30.6ECh. 30 - A 2.50-mH toroidal solenoid has an average radius...Ch. 30 - Prob. 30.8ECh. 30 - Prob. 30.9ECh. 30 - Prob. 30.10ECh. 30 - Prob. 30.11ECh. 30 - Prob. 30.12ECh. 30 - Prob. 30.13ECh. 30 - A long, straight solenoid has 800 turns. When the...Ch. 30 - Prob. 30.15ECh. 30 - Prob. 30.16ECh. 30 - Prob. 30.17ECh. 30 - Prob. 30.18ECh. 30 - Prob. 30.19ECh. 30 - Prob. 30.20ECh. 30 - In a proton accelerator used in elementary...Ch. 30 - It is proposed to store l.00 kWh = 3.60 106J of...Ch. 30 - Prob. 30.23ECh. 30 - Prob. 30.24ECh. 30 - Prob. 30.25ECh. 30 - In Fig. 30.11, switch S1 is closcd while switch S2...Ch. 30 - In Fig. 30.11, suppose that = 60.0 V, R = 240 ,...Ch. 30 - Prob. 30.28ECh. 30 - Prob. 30.29ECh. 30 - Prob. 30.30ECh. 30 - In an L-C circuit. L = 85.0 mH and C = 3.20F....Ch. 30 - Prob. 30.32ECh. 30 - A 7.50-nF capacitor is charged up to 12.0 V, then...Ch. 30 - Prob. 30.34ECh. 30 - Prob. 30.35ECh. 30 - A Radio Tuning Circuit. The minimum capacitance of...Ch. 30 - An L-C circuit containing an 80.0-mH inductor and...Ch. 30 - An L-R-C series circuit has L = 0.600 H and C =...Ch. 30 - Prob. 30.39ECh. 30 - An L-R-C series circuit has L = 0.400 H, C = 7.00...Ch. 30 - Prob. 30.41ECh. 30 - Prob. 30.42PCh. 30 - Prob. 30.43PCh. 30 - Prob. 30.44PCh. 30 - Solar Magnetic Energy. Magnetic fields within a...Ch. 30 - CP CALC A Coaxial Cable. A small solid conductor...Ch. 30 - Prob. 30.47PCh. 30 - CALC Consider the circuit in Fig. 30.11 with both...Ch. 30 - Prob. 30.49PCh. 30 - Prob. 30.50PCh. 30 - Prob. 30.51PCh. 30 - Prob. 30.52PCh. 30 - Prob. 30.53PCh. 30 - A 6.40-nF capacitor is charged to 24.0 V and then...Ch. 30 - An L-C circuit consists of a 60.0-mH inductor and...Ch. 30 - A charged capacitor with C = 590 F is connected in...Ch. 30 - CP In the circuit shown in Fig. P30.57, the switch...Ch. 30 - Prob. 30.58PCh. 30 - Prob. 30.59PCh. 30 - Prob. 30.60PCh. 30 - Prob. 30.61PCh. 30 - Prob. 30.62PCh. 30 - Prob. 30.63PCh. 30 - After the current in the circuit of Fig. P30.63...Ch. 30 - CP In the circuit shown in Fig. P30.65, switch S...Ch. 30 - Prob. 30.66PCh. 30 - Prob. 30.67PCh. 30 - Prob. 30.68PCh. 30 - Prob. 30.69PCh. 30 - CP A Volume Gauge. A tank containing a liquid has...Ch. 30 - Prob. 30.71CPCh. 30 - BIO QUENCHING AN MRI MAGNET. Magnets carrying very...Ch. 30 - BIO QUENCHING AN MRI MAGNET. Magnets carrying very...Ch. 30 - BIO QUENCHING AN MRI MAGNET. Magnets carrying very...Ch. 30 - BIO QUENCHING AN MRI MAGNET. Magnets carrying very...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- In Figure 33.9A (page 1052), the switch is closed at a at t = 0. Find an expression for the power dissipated by the resistor as a function of time, and sketch your result. Is the power lost greater as soon as the switch is closed or a long time after it has been closed? Does your answer make sense?arrow_forwardShow that Equation 32.28 in the text Ls Kirchhoffs loop rule as applied to the circuit in Figure P32.56 with the switch thrown to position b.arrow_forwardFigure P18.37 shows a simplified model of a cardiac defibrillator, a device used to patients in ventricular fibrillation. 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 patients torso, modeled as the resistor Rtorso, allowing the hearts normal rhythm to be reestablished. (a) If the capacitor is initially uncharged with C = 8.00 F and = 1250 V, find the value of R required to charge the capacitor to a voltage of 775 V in 1.50 s. (b) If the capacitor is then discharged across the patients torso with, Rtorso = 1250 , calculate the voltage across the capacitor after 5.00 ms. Figure P18.37arrow_forward
- In an oscillating RLC circuit, R = 7.0 L. = 10 mH. And C = 3.0 F. Initially, the capacitor has a charge of 8.0 C and the current is zero. Calculate the charge on the capacitor (a) five cycles later and (b) 50 cycles later.arrow_forwardA generator connected to the wheel or hub of a bicycle can be used to power lights or small electronic devices. A typical bicycle generator supplies 6.00 V when the wheels rotate at = 20.0 rad/s. (a) If the generator's magnetic field has magnitude B = 0.600 T with N = 100 turns, find the loop area A. (b) Find the time interval between the maximum emf of +6.00 V and the minimum emf of 6.00 V.arrow_forwardJust after the switch has been closed, why does I=0?arrow_forward
- The figure shows an LR circuit with L = 0.15 H, R = 25 Ω, and Vo = 36 V. The switch is initially open. Eight milliseconds (t = 8 ms) after the switch is closed, what is the current in the circuit and the potential difference between points a and b, Vab ?arrow_forwardƐz= 18 V 非 b 0.5 Q R 2.5 Q R, a 6.0 2 R 1.5 2 h 0.5 N E, = 45 V %3D What is the equation which results when applying the loop rule to loop aedcba, in terms of the variables given in the figure? 0 = If the current through the middle part of the loop is I = 4.75 amps, what is the current through the top loop, I2, in amps? I =arrow_forward10 V 10 mH 40. In the circuit shown above, the switch S is closed at t= 0. Which of the following best represents the voltage across the inductor, as seen on an oscilloscope? (A) Voltage 10 v (B) Voltage 10 v 5 msec 20 msec (C) Voltage 10 v (D) Voltage 10 V 200 sec 5 msec (E) Voltage 10 V 200 secarrow_forward
- This LR circuit has time constant named tau, t, and maximum current, If = V/R. Which one of the following best gives an equation for current after time tau, t, the switch has been closed? V If/T (i.e., If/tau) zero If (e-1)/e O I4/e If/earrow_forwardConsider the circuit shown in the figure, with ε=36.0 V ,R0=50.0Ω ,R=150Ω andL=4.00H . (a) Switch S1 is closed. Just after S1 is closed, what are the current i0through R0andthe potential differences V AC and V CB ?(b) After S1 has been closed a long time so that the current has reached its final, steadyvalue, what are i0, V AC and V CB ?(c) Find the expressions for i0, V AC and V CB as functions of time since S1 was closed.Do your results agree with what you get in (a) and (b) ? Graph i0, V AC and V CB as afunction of timearrow_forward
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