Question

What is the strength of an electromagnet with a cylindrical iron core 6 inches long and 1/4 in in diameter. The core will have 328ft of 32-gauge enameled copper wire coiled around it rougly 550 times. A current of 1amp will be applied

Answer 1

Basically strength of Electromagnet refers to the Magnetic Field strength of the core :

We know Magnetic field strength is given by simple formula :

For a Coil of wire across cylindrical core :

• H is the strength of the magnetic field in ampere-turns/metre, At/m
• N is the number of turns of the coil
• I is the current flowing through the coil in amps, A
• L is the length of the coil in metres, m

Now , in the given question :

Length = 6 inches

=0.1524 metres

N is the number of times wire coiled around the core

Here it is given as :

N=550 turns

And , It is given current is :

I = 1 Amp

Hence , Strength is given as :

H=3608.92 At/m