1.5V विभवांतराच्या 3 विद्युतघटांची बॅटरी स्वरुपात जोडणी केली आहे .या बॅटरीचे विभवांतर .......V इतके असेल.(Three electric cells of potential difference 1.5V each has been connected as a battery.The potential difference of the battery will be ....... V.) *