What is the Direction of the Field and Current in a Changing Magnetic Field?

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Homework Help Overview

The discussion revolves around a problem involving a 200-loop coil situated in a magnetic field that is changing over time. The magnetic field initially directed out of the page decreases in strength, and participants are exploring the implications of this change on the direction of the magnetic field and the resulting current in the coil.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are attempting to determine the direction of the magnetic field and the induced current in the loop. There is a focus on understanding the relationship between the magnetic field direction and the current flow, with some questioning the application of the right-hand rule for this scenario.

Discussion Status

There is an ongoing exploration of the right-hand rule and its application to the problem. Some participants express uncertainty about how to correctly position their hands to visualize the magnetic field and current direction, indicating a productive dialogue about the conceptual understanding of magnetic fields and induced currents.

Contextual Notes

Participants are working within the constraints of the problem statement and are discussing the implications of the changing magnetic field on the induced current without providing explicit solutions or methods.

superslow991
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Homework Statement



A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the page. An external magnetic field of 0.060 T is directed out of the plane of the page. The external field decreases to 0.020 T in 12 milliseconds.

Homework Equations


No equation

The Attempt at a Solution


Just trying to figure what would be the direction of the magnetic field and the current in the loop. If the field is going out of the page wouldn't the magnetic flux follow suit? So wouldn't the current in the loop be clockwise? sort of stuck on this part.
 
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superslow991 said:

Homework Statement



A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the page. An external magnetic field of 0.060 T is directed out of the plane of the page. The external field decreases to 0.020 T in 12 milliseconds.

Homework Equations


No equation

The Attempt at a Solution


Just trying to figure what would be the direction of the magnetic field and the current in the loop. If the field is going out of the page wouldn't the magnetic flux follow suit? So wouldn't the current in the loop be clockwise? sort of stuck on this part.
Use the right-hand curl rule for magnetic polarity of a current carrying coil.
If the field is coming out of the plane of the page, what should be the current direction?
 
cnh1995 said:
Use the right-hand curl rule for magnetic polarity of a current carrying coil.
If the field is coming out of the plane of the page, what should be the current direction?
That's the problem, right hand rule is kinda tricky for me not sure where to position my fingers for the field going in or out the page
 
superslow991 said:
That's the problem, right hand rule is kinda tricky for me not sure where to position my fingers for the field going in or out the page
Point your thumb out of the page (i.e. towards yourself) and curl your fingers. Thumb represents direction of the field and curled fingers denote the direction of current flow (CW or CCW).
 
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cnh1995 said:
Point your thumb out of the page (i.e. towards yourself) and curl your fingers. Thumb represents direction of the field and curled fingers denote the direction of current flow (CW or CCW).
Thanks a lot
 

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