A uniform magnetic field of magnitude 0.20 T exists in space from east to west what speed should a particle of mass 0.010 g and having a charge `1.0 X 10^(-5)C` be projected from south to north so that it moves with a uniform velocity?

Explanation

To solve the problem, we need to find the speed at which a charged particle should be projected so that it moves with a uniform velocity in a magnetic field. Here are the steps to derive the solution:

### Step 1: Identify the forces acting on the particle
When the charged particle enters the magnetic field, two forces act on it:
- The magnetic force (\(F_B\)) acting upward.
- The gravitational force (\(F_g\)) acting downward.

For the particle to move with a uniform velocity, these two forces must be equal in magnitude.
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