If the cross sectional area of a cable is increased, what will happen to the voltage drop?
- Decrease.
- Increase.
- Stay the same.
Explanation from PART66Online
Resistance is inversely proportional to cross-sectional area, so increasing a cable's CSA lowers its resistance. Since voltage drop equals current times resistance, the drop along the cable decreases for the same current. This is why larger conductors are chosen for long runs to keep voltage drop within limits.
A
Azfar asked · 4 Sep 2013
why does the voltage drop decreases? According to my understanding, V=IR. When cross sectional area increases, resistance will increase, hence increasing the voltage. Are voltage and voltage drop both different things?
Community Comments (2)
P
PART66Online
4 Sep 2013
If cross-sectional area is increased - resistance is decreased.
A
Azfar
4 Sep 2013
ok..thank you
Please Sign In to post a comment.