The coil of a tangent galvanometer of radius 12cm is having 200turns. If the horizontal component of earth's magnetic field is `25muT`. Find the current which gives a deflection of `60^(@)`.
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To solve the problem of finding the current that gives a deflection of \(60^\circ\) in a tangent galvanometer, we can follow these steps:
### Step-by-Step Solution:
1. **Identify the Given Values:**
- Radius of the coil, \( R = 12 \, \text{cm} = 0.12 \, \text{m} \)
- Number of turns, \( n = 200 \)
- Horizontal component of Earth's magnetic field, \( H = 25 \, \mu T = 25 \times 10^{-6} \, T \)
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