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`        A uniform magnetic field of magnitude 0.20 T exists in space from east to west. With what speed should a particle of mass 0.0.10 g and having a charge 1.0 × 10^-5 C be projected from south to north so that it moves with a uniform velocity?`
3 years ago

Kevin Nash
332 Points
```										Sol. B = 0.20 T, υ = ? m = 0.010g = 10^–5 kg, q = 1 × 10^–5 C
Force due to magnetic field = Gravitational force of attraction
So, qυB = mg
⇒ 1 × 10^–5 × υ × 2 × 10^–1 = 1 × 10^–5 × 9.8
⇒ υ = 9.8 * 10^-5/2 * 10^-6 = 49 m/s.

```
3 years ago
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