Please help me solve this combo circuit (series-parallel) Check the picture. It has 4 resistors. Given I total = 0.4A R1 = 10 ohms R3 = 20 ohms V4 = 6V
For series resistors, the equivalent resistance is the summation of the resistances. Therefore:
For parallel resistors, the equivalent resistance is 1 over the sumation of 1 over the resistances:
We know that the voltage across R6 is V4. Therefore, according to Ohm's Law:
`I_T = V_4/R_6`
`(R_4(R_2+R_3))/(R_2+R_3+R_4) = V_4/I_T`
Now, substitute what we know:
We don't have enough information to solve any further than that; therefore, `R_2 ` and `R_4` are any such values that satisfy the above equation.