Force between the two parallel wires carrying currents has been used to define.

• (A) Ampere
• (B) Coulomb
• (C) Volt
• (D) Watt

The force between two parallel wires carrying electric currents is fundamental in defining the unit of electric current known as the Ampere.

Understanding the Ampere

The Ampere is one of the seven base units in the International System of Units (SI). It is defined based on the force experienced between two long, parallel conductors carrying electric current.

Key Points

• The Ampere is defined as the current that, when flowing through two infinitely long parallel wires one meter apart in a vacuum, produces a force of 2 x 10^-7 newtons per meter of length between them.
• This definition highlights the relationship between electric current and magnetic forces.

In summary, the correct answer to your question is A) Ampere.