A pair of parallel conducting rails that are L = 22 cm apart lies at right angles to a uniform magnetic field of 0.4 T directed into the page, as shown in the figure below. Á R = 14 2 resistor is connected across the rails. A conducting bar is moved to the right at 2 m/s across the rails. B , into page 2 m/s L 1) What is the current in the resistor? (Express your answer to two significant figures.) mA (Submit You currently have O submissions for this question. Only 10 submission are allowed. You can make 10 more submissions for this question. 2) What direction is the current in the bar (up or down)? Oup O down Submit You currently have 1 submissions for this question. Only 10 submission are allowed. You can make 9 more submissions for this question. Your submissions: A :/ Submitted: Sunday, July 25 at 1:24 PM Feedback: The induced current i produces an induced magnetic field Bloop that opposes the change in flux. Therefore, the current in the bar points up. 3) What is the magnetic force on the bar due to the induced current? (Express your answer to two significant figures.) mN Submit You currently have O submissions for this question. Only 10 submission are allowed. You can make 10 more submissions for this question. 4) What direction is the magnetic force on the bar due to the induced current? Oto the left Oto the right Oupwards Odownwards Ointo the page

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 21P: Two long wires, one of which has a semicircular tend of radius R, are positioned as shown in the...

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Question

A pair of parallel conducting rails that are L = 22 cm apart lies at right angles to a uniform magnetic field of 0.4 T directed into the page, as shown in the figure below. A R = 14 Ω resistor is connected across the rails. A conducting bar is moved to the right at 2 m/s across the rails.

1)What is the current in the resistor? (Express your answer to two significant figures.)

2)What is the magnetic force on the bar due to the induced current? (Express your answer to two significant figures.)

A pair of parallel conducting rails that are L = 22 cm apart lies at right angles to a uniform magnetic field of 0.4 T
directed into the page, as shown in the figure below. Á R = 14 2 resistor is connected across the rails. A conducting bar
is moved to the right at 2 m/s across the rails.
,into
page
2 m/s
L
1) What is the current in the resistor? (Express your answer to two significant figures.)
mA (Submit
You currently have O submissions for this question. Only 10 submission are allowed.
You can make 10 more submissions for this question.
2) What direction is the current in the bar (up or down)?
Oup
O down
Submit
You currently have 1 submissions for this question. Only 10 submission are allowed.
You can make 9 more submissions for this question.
Your submissions:
A :/
Submitted: Sunday, July 25 at 1:24 PM
Feedback: The induced current i produces an induced magnetic field Bloop that opposes the change in flux. Therefore, the
current in the bar points up.
3) What is the magnetic force on the bar due to the induced current? (Express your answer to two significant figures.)
mN Submit
You currently have O submissions for this question. Only 10 submission are allowed.
You can make 10 more submissions for this question.
4) What direction is the magnetic force on the bar due to the induced current?
Oto the left
Oto the right
Oupwards
Odownwards
Ointo the page
O out of the page
Submit
You currently have 1 submissions for this question. Only 10 submission are allowed.
You can make 9 more submissions for this question.
Your submissions:
Submitted: Sunday, July 25 at 1:24 PM
Feedback: According to the right-hand rule, the magnetic force points to the left.

B , into page
R
2 m/s
1) What is the current in the resistor? (Express your answer to two significant figures.)

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