In the relation `F=q(VxxB),` which paiers are always perpendicular to each other.

Explanation

To solve the question regarding the relation \( F = q(\mathbf{V} \times \mathbf{B}) \) and to identify which pairs are always perpendicular to each other, we can follow these steps:

### Step 1: Understand the Cross Product
The equation \( F = q(\mathbf{V} \times \mathbf{B}) \) involves a cross product. By definition, the cross product of two vectors results in a third vector that is perpendicular to the plane formed by the original two vectors.

### Step 2: Identify the Vectors
In this equation:
- \( \mathbf{V} \) is the velocity vector of the charge.
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