Can we make stronger electromagnet by using less voltage and current but very thicker wire and more number of turns in a coil?

Ignacio Riggs
2022-10-16
Answered

If we increase the number of turns in a coil, the resistance increases, to overcome this, we can use very thicker wire and keep the voltage low to keep the current constant, and by the formula, this should make stronger electromagnet even by supplying less voltage.

Can we make stronger electromagnet by using less voltage and current but very thicker wire and more number of turns in a coil?

Can we make stronger electromagnet by using less voltage and current but very thicker wire and more number of turns in a coil?

You can still ask an expert for help

rcampas4i

Answered 2022-10-17
Author has **22** answers

You forgot one parameter: Length. The magnetic field $B$ is proportional to the turn density, denoted by $n$. $n=N/L$ , where $N$ - no of turns and $L$ - length of the solenoid. So if you wish to increase the thickness of the wire, you wouldn't be able to fit the same number of turns in the same length. The turns will be less and hence the field. So only option remains is to increase the length, which in turn would keep the ratio $N/L$ constant.

Lance Liu

Answered 2022-10-18
Author has **2** answers

What determines the electromagnet's strength is how much current is flowing in the wire and how many turns there are in the coil. Of course smaller, longer wire has more resistance and requires a larger voltage to drive the same current. Your choice of power supply will determine the maximum current that it can drive through a given resistance.

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Coil with $1\mathrm{\Omega}$ resistance.

I want to assemble circuit to power coil and control amount of current flow with MOSFET.

But before that I'd like to know. What does affect on electromagnet field ?

Current or power ?

For example:

If Current flow, then $1A$ and $1V$, would be the same as 1A and $10V$.

If Power, then $1A$ and $5V$ would be the same as $0.25A$ and $20V$.

I want to assemble circuit to power coil and control amount of current flow with MOSFET.

But before that I'd like to know. What does affect on electromagnet field ?

Current or power ?

For example:

If Current flow, then $1A$ and $1V$, would be the same as 1A and $10V$.

If Power, then $1A$ and $5V$ would be the same as $0.25A$ and $20V$.

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When a electromagnet is activated, the field must take time to form at both ends and stabilize. What is this time? Or, to put it differently, what is the speed at which the magnetic field forms?