What Happens to Magnetic Fields in Coils with Reversed Currents?

[charikaar]

Hello,

out of 23 homework questions i found this difficult. can anyone help please.

Q22. Two coils A and B are made around two tubes. Each has teh same number of turns of wire and is the same size. A soft iron bar is placed inside each tube.

(a)The same currect is passed through A and B. what happens?
(b) The current through A is reversed to that in B. What happens?



thank you

Charikaar

 

[$id]

(a) If the same current is passed then the flux produced

(b) The magnetic poles of the solenoid is reversed.

I think lol

sid

 

[thepatientmental]

Hi Charikaar,

I'm happy to help with your homework question about electricity. Let's break down the problem and see if we can find the answers together.

First, we have two coils, A and B, made around two tubes. They have the same number of turns of wire and are the same size. This means that they have the same resistance and will conduct electricity in a similar way.

Next, we have a soft iron bar placed inside each tube. Soft iron is a magnetic material, so it will interact with the electric current passing through the coils.

Now, for part (a) of the question: if the same current is passed through both coils A and B, what happens? Since the coils have the same resistance, the same amount of current will flow through each one. This means that the soft iron bars inside the tubes will experience the same magnetic force, and will align in the same direction. This is because opposite currents in the two coils will create opposite magnetic fields, but since the coils are identical, the fields will cancel each other out.

For part (b) of the question: if the current through coil A is reversed to that in B, what happens? This means that the magnetic fields created by the coils will now be in the same direction. As a result, the soft iron bars inside the tubes will also align in the same direction, creating a stronger magnetic field.

I hope this helps you understand the concept better. If you have any further questions, feel free to ask. Good luck with your homework!