Current in Top Loop: Increase, Decrease, or No Change?

AI Thread Summary
When the current in the bottom loop increases, the top loop's current is affected by Lenz's Law, which states that an induced current will oppose the change in magnetic flux. The discussion suggests that as the current in the bottom loop increases, it creates a magnetic field that induces a current in the top loop, leading to a decrease in the top loop's current. The reasoning is based on the right-hand thumb rule, indicating that the magnetic field direction is upward. Thus, the increase in current in the bottom loop results in a decrease in the current in the top loop. Overall, the interaction between the two loops demonstrates the principles of electromagnetic induction.
chukie
Messages
79
Reaction score
0
Two loops have current flowing through them (see picture). The top loop lies directly above the bottom one. When the current in the bottom loop is increased, what happens to the top loop's current? Does it increase, decrease, go to zero, doesn't change or it depends on the relative values for current.

http://img167.imageshack.us/img167/56/loopto0.th.png


I was thinking that this had something to do with Lenz's Law. So I was thinking when the top current increase, the bottom would try to counter it by also increasing? But there is no magnetic field involved?
 
Last edited by a moderator:
Physics news on Phys.org
the current in above one should decrease.

i hope the diagram is correct ((current in both of them is clockwise .))

so by right hand thumb rule magnetic field would be in upper direction
as current increases it would also increase the mag. F
now by lenz's law current in above should decrease.
 

Thread 'Rolling without slipping on a curved surface'

Kindly see the attached pdf. My attempt to solve it, is in it. I'm wondering if my solution is right. My idea is this: At any point of time, the ball may be assumed to be at an incline which is at an angle of θ(kindly see both the pics in the pdf file). The value of θ will continuously change and so will the value of friction. I'm not able to figure out, why my solution is wrong, if it is wrong .
View full post »
Thread 'Voltmeter readings for this circuit with switches'

Thread 'Voltmeter readings for this circuit with switches'

TL;DR Summary: I would like to know the voltmeter readings on the two resistors separately in the picture in the following cases , When one of the keys is closed When both of them are opened (Knowing that the battery has negligible internal resistance) My thoughts for the first case , one of them must be 12 volt while the other is 0 The second case we'll I think both voltmeter readings should be 12 volt since they are both parallel to the battery and they involve the key within what the...
View full post »
Thread 'Trying to understand the logic behind adding vectors with an angle between them'

Thread 'Trying to understand the logic behind adding vectors with an angle between them'

My initial calculation was to subtract V1 from V2 to show that from the perspective of the second aircraft the first one is -300km/h. So i checked with ChatGPT and it said I cant just subtract them because I have an angle between them. So I dont understand the reasoning of it. Like why should a velocity be dependent on an angle? I was thinking about how it would look like if the planes where parallel to each other, and then how it look like if one is turning away and I dont see it. Since...
View full post »

Similar threads

Induced current and force on circular loop in varying magnetic field
Replies
4
Views
1K
Induced Current Direction in a Changing Magnetic Field
Replies
1
Views
2K
How does an eddy current brake work exactly?
Replies
2
Views
2K
What happens to the current in a loop when a magnet approaches
Replies
6
Views
2K
Analyzing Bridge Circuit w/ Loop Currents
Replies
6
Views
1K
Induced current in two connected loops
Replies
5
Views
2K
Help! Finding Direction of Current in Magnetic Circuit
Replies
9
Views
2K
Direction of induced current in the loop
Replies
2
Views
3K
Lenz's law: Current induced in a split loop by a changing B-field
Replies
6
Views
2K
How to find the maximum induced current for a diamond-shaped loop?
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top