a)in series total resistance=12 ohm current=15/12 power=(15/12)2*6 energy spent per minute=power*60 J=562.5 J
b)in parallel total resistance=6*4/(4+6)+2=4.4 ohm current=15/4.4 terminal pd=15-current*internal resistance=15-15*2/4.4=36/4.4 V pd across 6 ohm=terminal pd=36/4.4 power=(pd)2/6 energy spent per minute=power*60 J=669.42 J
Moderation Team
![[Post New]](/templates/default/images/icon_minipost_new.gif){kind=icon}
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
47
