- #1
terryds
- 392
- 13
Homework Statement
The equivalent resistance of the series combination of two resistors is p.When
they are joined in parallel, the equivalent resistance is q. If p = nq, find the
minimum possible value of n.
Homework Equations
1/Rparallel = 1/R1+1/R2+...
Rseries = R1+R2+...
The Attempt at a Solution
R1+R2=p
R1 R2 / ( R1 + R2 ) = q
Then, I substitute p as nq
R1+R2=nq
R1 R2 / ( R1 + R2 ) = q
I divide the equation 1 and equation 2 and get
##n=\frac{(R_1+R_2)^{2}}{R_1R_2}##
which I think that the minimum value is zero
However, the textbook says that the answer is 4
Please help