What would the current I1 be in (Figure 1) if the 12- Ω resistor is shorted out? Let r = 1.5 Ω

Question

https://d2vlcm61l7u1fs.cloudfront.net/media%2F7ed%2F7edf7951-3b8b-407c-a773-de7949bf0501%2FphpB5zVAJ.png

Answer 1

You need to apply Kirchoff's loop rule for voltage conservation and apply ohms law over each resistor. You will get a system of equations that you can solve algebraically.