Question

The process of forcing the current at the outer side of the outer conductor to be zero is called _____

(a) Current distribution

(b) Current chokes

(c) Field effect

(d) Impedance chokes

Answer 1

Correct option is (a) Current distribution

For explanation I would say: A Balun is a device which connects a balanced two –conductor line to an unbalanced coaxial line. It eliminates field mismatch. It forces the current at the outer side of outer conductor to be zero. This is called current choke.