Magnets poles. Effect of magnet. Magnetic field. 10 класс

Field of Circular Loop

of Circular Loop

ілмек / петля
бастапқы/ начальный
Елестетіңіз / представьте
орау / обматывать
…-тан кұралады / состоит из
oртасы/ центр
тікбұрышты/ прямоугольный

wire is wound in the form of a circular loop, the magnetic field lines are formed at the centre and around the wire as in the Figures a and b

(b)

Magnetic Field lines of Circular Loop Wire

Circular Loop Wire

the current
the distance
the number of turns

Circular Loop Wire

Formula:

µ0 =4п10-7

Circular Loop Wire

A circular loop of radius r, carries a current of 15 A.
The magnetic field at the centre is 5 x10-5 T.
What is the radius r, in meters?

for example

Circular Loop Wire

Formula:

µ0 =4п10-7

x N
If the loop consists of N turns, as shown in the Figure.
The Magnetic Field (B) at the centre of the circular loop is N times stronger.

Figure.

Circular Loop Wire

The magnetic field at the centre of a circular loop of
50 turns of wire carrying a current of 2 A is 6 x 10–4 T.
What is the radius of the loop? (Take п = 3)

for example

Loop