A high resistance of 3,000 ohm is connected in series with a voltmeter. In so doing, the scale division becomes 300 times greater. Calculate the resistance of voltmeter.

Explanation

To solve the problem, we need to find the resistance of the voltmeter (Rv) when a high resistance of 3000 ohms is connected in series with it, resulting in the scale division becoming 300 times greater.

### Step-by-step Solution:

1. **Understanding the Initial Conditions:**
- Let the resistance of the voltmeter be \( R_v \).
- Let the number of divisions on the voltmeter scale be \( n \).
- Let the voltage measured by each division be \( V \).
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