What is the inverse relationship between electrical resistance and a metallic conductor?
Figure 12-41. The length of the conductor determines how much resistance you get. The cross-sectional area is the inverse of the resistance of a metallic conductor.
Why is resistance inversely proportional to area?
As the cross-section increases, the distance between charged particles decreases. This causes a decrease in collision probability. As such, the resistance decreases with increasing area. They are therefore inversely proportional.
Is resistance inversely proportional to resistivity?
Resistance has a proportional relationship to resistivity and length and an inverse relationship to cross-sectional area.
What is the relationship between resistance and the length of the metallic conductor?
The length of a metallic conductor directly affects its resistance. The resistance of a metallic conductor is directly proportional to its length.
What is the relation between resistance and diameter?
The thickness of a wire can be represented by its diameter. The diameter of a steel wire can be multiplied by its diameter (made 2x), and its resistance will become one-fourth (1/4). If the diameter is half (made 1/2), the resistance will become four times (4).
How does a short circuit affect resistance?
In circuit analysis, a shortcircuit is a connection that causes two nodes to have the same voltage. This is a short circuit that has no resistance or voltage drop. The result is a connection that has almost no resistance in real circuits.
What causes low resistance in a circuit?
All conductors emit heat at some point, so it is common for overheating to be a problem. The current flow is affected by the resistance. Possible causes: Insulators that have been damaged by moisture, heat, or both.
What was the effect on the current when a short circuit occurred?
Answer. Short-circuits cause the system’s current to rise to an abnormally high level while the system voltage drops to a low level. Short-circuits can cause excessive heating, which can lead to fire or explosion.