So that thing called inductance...

Does a coil of wire 1-meter length have more inductance than a straight wire of the same length?

Does coiling a wire change anything, or is it just something we do
to make it more compact and easier to work with? (I know there's something about inter-winding capacitance, but let's leave that alone for now.)

 

The wire wound in coil shape will have higher inductance since it creates a better magnetic circuit or magnetic path, i.e. more closed. On other hand the straight wire creates a magnetic path more open.

 

Self inductance is an effect of the magnetic field produced by the wire on itself. Coiling it concentrates the field, so, yes, the inductance is higher even for a single turn.

When there is more than one turn, each turn affects not only itself, but the other turns as well. That is why the inductance of a coil is proportional to the square of the number of turns.

 

Loop area is a concern for picking up interference. The loop area, the area between conductors, is very small for a twisted pair – low electromagnetic pickup. Between two loose conductors to a sensor, it's much larger – more potential for noise pickup.

 

" Does a coil of wire 1-meter length have more inductance than a straight wire of the same length? "

AC or DC?

 

" Does a coil of wire 1-meter length have more inductance than a straight wire of the same length? "

AC or DC?

Do you think it makes a difference?

To clarify: in the inductance?

 

Of course it does.

Inductance | Electronics, Magnetic Fields & Physics | Britannica

 

Of course it does.

If believe you are confusing inductance, which is an inherent physical property, with inductive reactance which is affected by frequency.

 

If believe you are confusing inductance, which is an inherent physical property, with inductive reactance which is affected by frequency.

Exactly.