Find and :

# Solution

Three resistors are in series and their equivalent, , is parallel with the voltage source. So, according to the Ohm’s law: . The negative sign comes from the direction .
Applying KCL at the bottom node:
.
The lucky winner of the Electrical Circuits Contest #1 is Kunal Marwaha from UC Berkeley. I would like to say thank you to all participants and I am thinking of holding contest #2 soon. Kunal, congratulations and soon you will receive the prize by Paypal.

Hi! Yaz is here. I am passionate about learning and teaching. I try to explain every detail simultaneously with examples to ensure that students will remember them later too.

## Join the Conversation

sir , can u give some information about electrical circuit contest…. . how can i participate?

1. Hi Sakhawat,

It is over for now. Hopefully, we will have a new contest soon.

1. kasyap says:

When is the next contest held sir (Date and year)?

2. Dharmendra Sharma says:

How can Ix be -ve since its direction is correct. I has to be +ve….

3. John says:

If Iy is -1A then Ix+Iy-2A=0 shouldn’t give Ix=3A?

1. A negative sign was missing from the KCL. It is corrected now.

4. sowji says: