Question

Nickel can be machined with 100% current efficiency, when current density value is ______________

(a) 10 A/cm^2

(b) 25 A/cm^2

(c) 45 A/cm^2

(d) 80 A/cm^2

This question was posed to me by my school principal while I was bunking the class.

This key question is from ECM-Process Characteristics topic in portion Electrochemical Processes of Advanced Machining

Answer 1

Right answer is (b) 25 A/cm^2

The explanation: Nickel is a metal suggested by Khayry, which can be machined at 100% current efficiency, if current density is 25 A/cm^2.