Final answer:
The forces between two current-carrying wires in an AC appliance cord, which are generally attractive, depend on the alternating current's RMS and peak values. Appliance cords don't usually require special designs to compensate for these forces as they are minimal. Calculations for the average and maximum forces require electrical physics formulas, not provided here.
Step-by-step explanation:
The question pertains to the forces between two wires carrying an alternating current (AC).
Calculating Force Per Meter
To find the average force per meter and the maximum force per meter between the wires, we would apply the formula for the magnetic force between two current-carrying wires. The force depends on the current in the wires, their separation, and the magnetic constant. However, the calculation of forces is not straightforward for an AC current, as the direction and magnitude of the current change with time.
As AC alternates, the average value would be different from the maximum value. The average force can be considered with the current at its RMS (root mean square) value, while the maximum force would occur when the current reaches its peak value.
Attractiveness and Special Design Features
The forces between the two wires are attractive when the current flows in the same direction and repulsive when it flows in opposite directions. However, as AC changes direction, the average effect would be an attractive force as they are more often flowing in the same direction than not due to their phase difference being in sync (typically with both wires part of the same circuit).
In terms of design, normal household appliance cords do not typically need special features to compensate for these forces since they are relatively small, but in some high current applications, considerations might have to be taken into account.