Question

Determine the Vo in the
circuit of the following
figure :​

Answer 1

Vo = 4.5 [V]

Step-by-step explanation:

In order to calculate this Vo voltage, we must first calculate the current through the entire circuit. For this, we perform a sum of voltages equal to zero.

ΣV = 0

`-9 +6*I+2*I+3 =0\\-6+8*I=0\\I = 6/8\\I=0.75[amp]`

We again perform a sum of voltages equal to zero but this time we do not include the voltage source of 3V as well as the resistance of 2[ohm]. It is as if the circuit is open between the ports of Vo.

ΣV = 0

`V_(o)-9+(6*0.75) = 0\\\\V_(o) = 4.5 [V]`