There will be no force between two current carrying wires if currents are

Options

A. parallel to each other
B. antiparallel to each other
C. perpendicular to each other
D. nothing can be said

Explanation

To solve the question "There will be no force between two current-carrying wires if currents are...", we need to analyze the conditions under which the magnetic force between two parallel current-carrying wires becomes zero.

### Step-by-Step Solution:

1. **Understanding the Concept of Magnetic Force**:
- When two parallel wires carry electric currents, they create magnetic fields around themselves. The interaction of these magnetic fields can result in a force between the wires.

2. **Formula for Magnetic Force**:
...