Direct-Current Circuits12318.38(a) The equivalent resistance of the parallel combination is 1112311111115 150 25 50 eqRRRR−−=++=+ +=ΩΩΩΩso the total current supplied to the circuit is 120 V8.0 A15 totaleqVIR∆===Ω(b) Since the appliances are connected in parallel, the voltage across each one is 120 VV∆=. (c) 120 V0.80 A150 lamplampVR∆=ΩI(d) ()222120 V5.810 W25 heaterheaterVR∆=×ΩP18.39From 2VR=∆P, the resistance of the element is 240 V19.2 3000 WVR∆=PΩWhen the element is connected to a 120-V source, we find that
This is the end of the preview. Sign up
access the rest of the document.