Question
Industrial Engineering Question on Electric Current
A thin copper wire carries electric current and is insulated by putting a sleeve, of thickness t, over it. In steady state conditions, the rate of heat loss from the insulated wire per unit length is Q. Which of the following is TRUE?
A
Q increases monotonically with t.
B
Q decreases monotonically with t.
C
Q first increases with increase in t, and then it decreases with further increase in t.
D
Q first decreases with increase in t, and then it increases with further increase in t.
Answer
Q first increases with increase in t, and then it decreases with further increase in t.
Explanation
Solution
The correct option is (C): Q first increases with increase in t, and then it decreases with further increase in t.