A galvanometer acting as voltmeter will have

Explanation:

A galvanometer can be converted into a voltmeter by connecting a high resistance in series with its coil. This is because a voltmeter is used to measure the potential difference across two points in a circuit and it must draw a very small current to avoid altering the circuit conditions. By placing a high resistance in series with the galvanometer, the overall resistance is increased, ensuring that only a small current passes through the galvanometer, thus preventing it from affecting the circuit.

Option 1, which suggests a high resistance in parallel, would not be suitable because it would allow more current to pass through the galvanometer, potentially damaging it and affecting the circuit conditions. Option 3 and Option 4, which suggest low resistance, would also not be appropriate because they would not limit the current sufficiently.

∴ The correct answer is option 2: High resistance in series with its coil.