The number of the turns in the primary coil of a transformer is 10 times than the same in the secondary coil . If the voltage across the primary is 20 V then find the voltage across the secondary .

Explanation

To solve the problem, we will use the transformer equation which relates the voltages and the number of turns in the primary and secondary coils.

### Step-by-Step Solution:

1. **Identify the given values:**
- Let \( N_p \) be the number of turns in the primary coil.
- Let \( N_s \) be the number of turns in the secondary coil.
- According to the problem, \( N_p = 10 \times N_s \).
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