Current flowing through a loop due to an infinite wire

AI Thread Summary
An infinitely long wire carrying a 1 A current creates a magnetic field that affects a nearby 5-turn circular loop. If the magnetic field at the center of the loop is zero, it suggests that the magnetic effects from the wire and the loop are canceling each other out. For a current to flow in the loop, an alternating current (AC) would be necessary to induce a change in the magnetic field. The discussion highlights the need for clarity on the problem statement and diagram to fully analyze the situation. Understanding the relationship between the wire's current and the loop's response is crucial for solving the problem.
eatsleep
Messages
42
Reaction score
0

Homework Statement


An infinitely long wire carrying a 1 A current in the positive x direction is placed along the x-axis in the vicinity of a 5-turn circular loop located in the x-y plane as shown in the figure. If the magnetic field at the center of the loop is 0, what is the direction and magnitude of the current flowing in the loop?

Homework Equations


Biot-Savat Law for the loop and amperes law for the wire

The Attempt at a Solution


I can calculate the magnetic field in the wire using amperes law, and same for the loop using the biot savat but if the magnetic field in the center is 0 is there any current flowing?
 
Physics news on Phys.org
eatsleep said:

Homework Statement


An infinitely long wire carrying a 1 A current in the positive x direction is placed along the x-axis in the vicinity of a 5-turn circular loop located in the x-y plane as shown in the figure. If the magnetic field at the center of the loop is 0, what is the direction and magnitude of the current flowing in the loop?

Homework Equations


Biot-Savat Law for the loop and amperes law for the wire

The Attempt at a Solution


I can calculate the magnetic field in the wire using amperes law, and same for the loop using the biot savat but if the magnetic field in the center is 0 is there any current flowing?

To induce a current in the loop, there would have to be an AC current flowing in the wire. Can you post a scan of the actual problem statement and diagram?
 
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 .
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...
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...
Back
Top