Series
Current
Req=R+R2+R3= 3+10+5= 18 ohms
Req=R1+R2+R3
9V
V=IR 9=I(18) / 18
I =.5 amps
.5 Amps. the current is constant.
.5 Amps. the current is constant.
V=IR
V=.5(3)
V=1.5 v
P=VI
1.5(.5) = .75 W
V=IR
.5(10)= V=5V
P=VI
5(.5) = 2.5 W
Parallel
voltage
1/Rt=1/R1+1/R2+1/R3
1/10+1/20+1/30= 5.5 ohms
1/Rt+1/R1+1/R2+1/R3
24
V=IR
24=1(20) /20
V=IR
24=I(30) / 30
I=1.2A
= .8A
24V, the voltage is constant in parallel circuits
P=VI
24(1.2)
P=28.8 watts
P=VI
24(.8)
P= 19.2 watts