A voltmeter has a range 0-V with a series resistance R. With a series resistance 2R, the range is 0-V'. The correct relation between V and V' is

(1) ${V}^{\text{'}}=2V$

(2) ${V}^{\text{'}}>2V$

(3) ${V}^{\text{'}}>>2V$

(4) $V\text{'}<2V$