- #1

- 8

- 3

## Homework Statement

## Homework Equations

Series[/B]

Vt= V1 + V2 + V3 etc

It = I1 = I2 = I3 etc

Parallel

Vt = V1 = V2 = V3 etc

It = I1 + I2 + I3

## The Attempt at a Solution

Vt= 20V V2= 5.0 V V4= 8.0V

It= 150 mA I2= 40 mA

Find I3, and I4

I've solved for the values of V already

V1 = 7.0V

V3 = 5.0V

So Vt = V1+V2=V3+V4

= 7.0V + 5.0V + 8.0V = 20V

But I'm getting confused on solving for I which is current.

I1 is in series with I2 and I4, but I2 is also parallel to I3. So which set of laws would I apply for solving for I3?

I know I1=I4 since they're in series.

I'm assuming I1=I1=It - I2

= 150 mA - 40mA = 110mA

But still stuck on how to solve for I3, since its not stated the bulbs are identical so I'm unsure if I3 would also be 40mA. I'd appreciate any help I can receive.