**Series** circuit connected to a d.c power supply of 12volts

R1 300ohms

R2 480ohms

R3 220ohms

is the total resistance 1000ohms?

is the total circuit supply current, 12/1000=0.012A?

the potential difference in volts across EACH resistor?

R1 300*0.012=3.6v?

R2 480*0.012=5.76v?

R3 220*0.012=2.64v?

3.6+5.76+2.64=12v?

**Parallel** circuit connected to a d.c power supply of 12volts

how do i calculate the total circuit resistance?

is it 300+480+220=1000ohms?

how do i calculate the total circuit supply current?

is this how to calculate the current through each resistor?

12v/300=0.04A

12v/480=0.025A

12v/220=0.054A

total= 0.119A?