A voltmeter of resistance `100 Omega` connected to the terminals of a cell reads 2 V. When the voltmeter is replaced by a resistance `1Omega` and an ammeter of `1Omega` , the ammeter reads 1 A. The EMF of the cell is __________ V.

Explanation

To find the EMF of the cell, we can analyze the two scenarios given in the problem step by step.

### Step 1: Analyze the first scenario with the voltmeter
- The voltmeter has a resistance of \( R_v = 100 \, \Omega \) and reads \( V = 2 \, V \).
- Let \( E \) be the EMF of the cell and \( r \) be the internal resistance of the cell.
- The current \( I \) flowing through the circuit can be calculated using Ohm's law:

\[
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