Four cells of emf 'E' are joined in parallel to form a battery. The equivalent emf of battery will be _________
IF VEENA'S CAR RADIOWILL RUN FROM A 12V CAR BATTERY THAT PRODUCES A CURRENT OF0.2A EVEN WHEN THE ENGINE IS TURNED OFF.THE CAR BATTERY WILL NO LONGER OPERATE WHEN IT HAS LOST 1.2*10 TO THE POWER 6 JOULE OF ENERGY. IF VEENA GETS OUT THE CAR LEAVING THE RADIO ON HOW LONG WILL IT TAKE FOR THE BATTERY TO GO COMPLETELY DEAD,THAT IS LOSE ALL ENERGY[1DAY=86400SEC]
Four cells of emf 'E' are joined in parallel to form a battery. The equivalent emf of battery will be _________