Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 22.1, Problem 1aTH
Use Lenz’ law to predict whether current will flow through the wire of the loop in each of the following cases. Explain your reasoning.
- just after the switch has been closed
- a long time after the switch has been closed
- just after the switch has been reopened
- a long time after the switch has been reopened
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Students have asked these similar questions
A portion of a loop of wire passes between the poles of a magnet as shown. We are
viewing the circuit from above. When the switch is closed and a current passes
through the circuit, what is the movement, if any, of the wire between the poles of
the magnet?
switch
P
S
B
N
The wire moves upwards (towards us)
The wire moves towards the south pole of the magnet
It doesn't move
The wire moves inwards (away from us)
The wire moves towards the north pole of the magnet
In the displayed circuit we have left the S switch open for a long time. Then we close it. Suppose that ε = 10 V, R1 = 50 kΩ, R2 = 100 kΩ and C = 10 mF. Find the value of the time constant:
a) Before closing the switch.
b) After closing the switch.
c) Suppose we turn off the switch at time t = 0. Find the current flowing through the switch as a function of time.
In the circuit of the figure below, the switch S has been open for a long time. It is then suddenly closed. (Use the following as necessary: E for E, R,, R,, t, and C.)
R1
R2
(a) Determine the time constant before the switch is closed.
(R1 + R2)C
(b) Determine the time constant after the switch is closed.
(R2)C
T =
(c) Let the switch be closed at t = 0. Determine the current in the switch as a function of time.
一劍
I =
R,
R.
Chapter 22 Solutions
Tutorials in Introductory Physics
Ch. 22.1 - Use Lenz’ law to predict whether current will flow...Ch. 22.1 - For each of the cases in which you predicted that...Ch. 22.1 - Suppose that the radius of the loop were...Ch. 22.1 - Check your answer regarding the direction of the...Ch. 22.1 - Find: the direction of the magnetic moment of the...Ch. 22.1 - A copper wire loop is initially at rest in a...Ch. 22.2 - On the two diagrams below, indicate the direction...Ch. 22.2 - Suppose the loop were replaced by a second loop...Ch. 22.2 - Five loops of copper wire of same gauge...Ch. 22.2 - Five loops of copper wire of same gauge...
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