1. The problem statement, all variables and given/known data A 3-V battery of internal resistance 1Ω is joined to a sliding wire of length 100 cm and resistance 5 Ω . A voltmeter , which takes negligible current , is connected across 60 cm length of the wire . (a) What is the reading of the voltmeter ? (b) If the reistance of the voltmeter were 150 Ω , then what would have been its reading ? 2. Relevant equations I=E/(R+r) 3. The attempt at a solution I=E/(R+r) V=IR V=0.5 x 5 =2.5 K=.025 Reading= .025x60=1.5 volt I am not getting second part .