In the circuit shown in the picture, current I is known and it's I=-80mA if E1=10V, if E1=38V current I is I=40mA. Find the I if E1=17V. Known values are: E2=6V, R1=300Ω and R5=100Ω.
This is what i have:
I tried using linearity theorem (i believe that's the correct name of the theorem):
I=E1*a+b
-80=10a+b first case
40=38a+b second case
from this equations i can find a and b
80=-10a-b
40=38a+b
120=28a a=4.29
now into first equation
-80=42.9+b b=-122.9
now i have a and b for the third case:
I=E1*a+b
I=17*4.29-122.9
I=-49.97mA
Is this correct, and is this good approach?
This is what i have:
I tried using linearity theorem (i believe that's the correct name of the theorem):
I=E1*a+b
-80=10a+b first case
40=38a+b second case
from this equations i can find a and b
80=-10a-b
40=38a+b
120=28a a=4.29
now into first equation
-80=42.9+b b=-122.9
now i have a and b for the third case:
I=E1*a+b
I=17*4.29-122.9
I=-49.97mA
Is this correct, and is this good approach?