[单选题]
99.40: Three different resistors R1, R2 andR3 are connectedd0kcng) b,w7y y 4oc,y in parallel ty 5ro nd6m.w2h8ogmsar-l4. so a battery. Suppose R1 has 2V across it, R2 = 4Ω, and R3 dissipa6.8hl ar o5ym2wrnm-sgods4 .tes 6 W. What is the current in R3?
