a. What should be the resistance r so that the input resistance between the
terminals is also equal to r?
b. What resistance r should be attached to terminals C and D so that the
resistance of the entire chain between terminals A and B does not depend on
the number of unit cells?
c. The total current in the circuit is I. Determine the currents in the nth cell
if the resistance chain is infinite. What is the resistance of such a chain?