No. Date Physics " POWER IN CIRCUITS" How much energy do Resistors ? How Much energy do batterves Supply? Power = rate energy transfer P= AE in Watts (w) T At S For electrical energy P= AV . A 9.4V a IV At At Move charge Aq through Voltage AV AV = Aq ov Power Supplied by battery: Pbatt IE e.emf Power dissipated by Resistor : PR : IAVR = I(IR) = I'R so PR : I'R.
No. Date ex: I = DV tt 2n.R R ISV Is E = 0,25A. 4-2 = R2. R, thz What is the power disipated byeach Resistor? P1= I'R P2 : I'R2 (4)(+)(2) (1)(1)(a) 0,125W 0,25W What IS the posser Supplied by the battery? I.E Purice . I'R e R R P 8 as R 0 "IE" R.