3.2 Flashcards
1
Q
In a small cross-sectional area, the heating is ….
A
Higher
2
Q
What is the formula for current density
A
Current density (J)= current (I)/cross sectional area (mm^2)
3
Q
If we increase the current density what happens to the amount of heat produced
A
The heat increases
4
Q
What is the ambient temperature for the cables
A
25 degrees C
5
Q
What temperature should cables not be heated over?
A
60 degrease C
6
Q
How can static electricity be produced
A
By contact,friction or induction
7
Q
What is current density
A
The current per mm2 conductor cross-section
