# A wire of length L is bent round in the form of a coil having N turns of same radius. If a steady current I flows through it in clockwise direction, then find the magnitude and direction of the magnetic field produced at its centre. What I tried is attached in the picture.

#
A wire of length L is bent round in the form of a coil having N turns of same radius. If a steady current I flows through it in clockwise direction, then find the magnitude and direction of the magnetic field produced at its centre. What I tried is attached in the picture.

## 6 Answers

4 years ago

Dear student

Let the radius of the coil be r

As tge wire is bent round in the form of coil having N turns.

N * circumference of coil = lemgle of wire

L = 2 r* N

Hence

r = L/ 2N

Now magnetic field is given by

B = o* N I/ 2r

B = o ** N² I/L

Regards

Arun (askIITians forum expert)

4 years ago

WHy arent we using the solenoid formula?

Lorem ipsum

Dear student Let the radius of the coil be r As tge wire is bent round in the form of coil having N turns. N * circumference of coil = lemgle of wire L = 2 r* N Hence r = L/ 2 N Now magnetic field is given by B = o* N I/ 2r B = o * * N² I/L Regards Arun (askIITians forum expert)

Posted by Arun

Lorem ipsum

Dear student Let the radius of the coil be r As tge wire is bent round in the form of coil having N turns. N * circumference of coil = lemgle of wire L = 2 r* N Hence r = L/ 2 N Now magnetic field is given by B = o* N I/ 2r B = o * * N² I/L Regards Arun (askIITians forum expert)

Posted by Arun

4 years ago

ear student

Let the radius of the coil be r

As tge wire is bent round in the form of coil having N turns.

N * circumference of coil = lemgle of wire

L = 2 r* N

Hence

r = L/ 2N

Now magnetic field is given by

B = o* N I/ 2r

B = o ** N² I/L

Regards,

4 years ago

Dear student Let the radius of the coil be r As tge wire is bent round in the form of coil having N turns. N * circumference of coil = lemgle of wire L = 2 r* N Hence r = L/ 2 N Now magnetic field is given by B = o* N I/ 2r B = o * * N² I/L

4 years ago

Dear student

Let the radius of the coil be r

As tge wire is bent round in the form of coil having N turns.

N * circumference of coil = lemgle of wire

L = 2 r* N

Hence

r = L/ 2N

Now magnetic field is given by

B = o* N I/ 2r

B = o ** N² I/L.

2 years ago

Let the radius of the coil be r

As tge wire is bent round in the form of coil having N turns.

N * circumference of coil = lemgle of wire

L = 2 πr* N

Hence

r = L/ 2πN

Now magnetic field is given by

B = μo* N I/ 2r

B = μo *π* N² I/L