Physics for Scientists and Engineers with Modern Physics
10th Edition
ISBN: 9781337553292
Author: Raymond A. Serway, John W. Jewett
Publisher: Cengage Learning
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Question
Chapter 31.2, Problem 31.2QQ
(i)
To determine
The circuit element across which the voltage is equal to the emf of the battery at the instant it is closed.
(b)
To determine
The circuit element across which the voltage is equal to the emf of the battery after a very long time.
Expert Solution & Answer
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Determine the current on the capacitor at any time t > 0 in a circuit
in series having an emf given by
t, when 0 T
a resistor of 6 ohms and an inductor of 2 H, if i(0) = 0.
%3D
A resistor and inductor are connected to a 9.0 V battery by a switch as shown. The moment
the switch is closed, current flows through the circuit. The resistor has a resistance of R =
470 Q and the inductor has an inductance of L = 0.115 H.
%3D
R
= 9.0V
a) What is the time constant (t=L/R) of the circuit? In which direction does current
flow in this circuit?
b) When the switch is first closed, what is the direction of the induced emf across L?
What is the maximum current in this circuit?
c) What is the potential difference across the inductor L after the switch has been
closed a long time (t >0)?
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Problem 3: An inductor with L = 8.5 H is in a closed circuit with I = 0.55 A (see the
diagram). When the switch is opened, the current goes to zero in At = 0.14 s.
%3D
%3D
%3D
L
Randomized Variables
ll
L = 8.5 H
I = 0.55 A
At = 0.14 s
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I
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Part (a) Express the magnitude of the average induced emf on the inductor, ɛave, in terms of L, I and At.
Expression :
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Eave =
Select from the variables below to write your expression. Note that all variables may not be required.
a, ß, At, 0, d, g, h, i, I, j, k, L, m, n, P
Part (b) Calculate the numerical value of ɛave in volts.
Numeric : A numeric value is expected and not an expression.
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Eave
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Chapter 31 Solutions
Physics for Scientists and Engineers with Modern Physics
Ch. 31.1 - A coil with zero resistance has its ends labeled a...Ch. 31.2 - Prob. 31.2QQCh. 31.3 - Prob. 31.3QQCh. 31.4 - Prob. 31.4QQCh. 31.5 - (i) At an instant of time during the oscillations...Ch. 31 - Prob. 1PCh. 31 - Prob. 2PCh. 31 - Prob. 3PCh. 31 - Prob. 4PCh. 31 - Prob. 5P
Ch. 31 - A toroid has a major radius R and a minor radius r...Ch. 31 - Prob. 7PCh. 31 - Prob. 8PCh. 31 - Prob. 9PCh. 31 - Prob. 10PCh. 31 - Prob. 11PCh. 31 - Prob. 12PCh. 31 - Prob. 13PCh. 31 - You are working as a demonstration assistant for a...Ch. 31 - Prob. 15PCh. 31 - Prob. 16PCh. 31 - Prob. 17PCh. 31 - Prob. 18PCh. 31 - Prob. 19PCh. 31 - Prob. 20PCh. 31 - Prob. 21PCh. 31 - Prob. 22PCh. 31 - Prob. 23PCh. 31 - Prob. 24PCh. 31 - Prob. 25PCh. 31 - Prob. 26PCh. 31 - Prob. 27PCh. 31 - Prob. 28PCh. 31 - In the circuit of Figure P31.29, the battery emf...Ch. 31 - Prob. 30PCh. 31 - Prob. 31PCh. 31 - Prob. 32PCh. 31 - In Figure 31.15, let R = 7.60 , L = 2.20 mH, and C...Ch. 31 - Prob. 34PCh. 31 - Electrical oscillations are initiated in a series...Ch. 31 - Prob. 36APCh. 31 - A capacitor in a series LC circuit has an initial...Ch. 31 - Prob. 38APCh. 31 - Prob. 39APCh. 31 - At the moment t = 0, a 24.0-V battery is connected...Ch. 31 - Prob. 41APCh. 31 - Prob. 42APCh. 31 - Prob. 43APCh. 31 - Prob. 44APCh. 31 - Prob. 45APCh. 31 - At t = 0, the open switch in Figure P31.46 is...Ch. 31 - Prob. 47APCh. 31 - Prob. 48APCh. 31 - Prob. 49APCh. 31 - Prob. 50CPCh. 31 - Prob. 51CPCh. 31 - Prob. 52CPCh. 31 - Prob. 53CP
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