Does a charge Particle gain K.E. when passed through magnetic field region? Justify.

Explanation

To determine whether a charged particle gains kinetic energy when it passes through a magnetic field, we can analyze the situation step by step.

### Step-by-Step Solution:

1. **Understanding the Scenario**:
- We have a charged particle (with charge \( q \)) moving with an initial velocity \( v \) and enters a region with a uniform magnetic field \( B \).

2. **Direction of Motion and Magnetic Field**:
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