The resistance of a wire is determined by the following formula. R = (rho)L/A, where the greek letter rho (it looks like a p) is a value assigned to a material based on how resistive it is by nature, L is the length of the wire, and A is the cross-sectional area (AKA how thick the wire is). Increase the length, or change the material to something with higher restistivity. Hope this helps!
The thermal vibration of the atoms in the material increases the resistance of that substance. The resistance is greatly depends on temperature.
-- scrape away a small amount of metal from a spot in the wire, making that spot thinner
-- heat the wire
The voltage of the battery, and the resistance of the circuit (including the resistance of the wire and the internal resistance of the battery).
If the resistance of the wire is 30 ohms and the voltage between the two ends of the wire is 45 volts,then the current through the wire isI = E/R = (45/30) = 1.5 amperes.
Two reasons:Mostly a stranded wire is far more flexible than a solid one and less likely to break after repeated flexing.At AC frequencies in the RF range an effect called the "skin effect" starts to become significant, current flow restricts itself to the skin of the conductor and the wire resistance rises. Stranded wire offers more skin and thus reduces the wire resistance again.
He led the two resistance movements against Canadian government and Sir John A. Macdonald.
outline two examples of passive resistance led by women in the Caribbean
The resistance can be changed in following two ways: 1.By change the length of the wire. 2.By changing the area of cross section of the wire.
The resistance can be changed in following two ways: 1.By change the length of the wire. 2.By changing the area of cross section of the wire.
If a resistive wire is elongated, its resistance will increase. This is because the longer length of wire will result in more collisions between electrons and the wire's atoms, leading to higher resistance. The resistance of a wire is directly proportional to its length.
Yes, a longer wire typically results in higher resistance due to increased resistance caused by the increased length. This is because longer wires offer more resistance to the flow of electrons.
You don't specify what you are referring to. However, if your question relates to resistance in general, then you should know that resistance is directly-proportional to the length of a conductor and to its resistivity, and inversely-proportional to its cross-sectional area. Resistivity is a characteristic of the material from which a conductor is made, and varies from one material to another.This means that you can increase resistance by increasing the length of a conductor, or by decreasing its cross-sectional area, or by selecting a conductor manufactured from a material with a greater resistivity (e.g. by using aluminium rather than, say, copper).
The voltage of the battery, and the resistance of the circuit (including the resistance of the wire and the internal resistance of the battery).
A wire with a larger cross section has lower resistance because there is more space for the electrons to flow through, reducing collisions. A smaller cross section increases resistance as there is less space for the electrons to move, causing more collisions and therefore higher resistance.
The thinner the wire, the higher the resistance. The thicker the wire, the resistance decreases. Think of it this way. The thick wire has more room for electrons to jump around, but the thin wire has less room.
movement and heat
Peripheral resistance can be increased by an increase in blood volume and the constricting of blood vessels.
This is kind of sticky to explain. A flow of electrons is exactly like distance in geometry - the shortest distance between two points is a straight line. Distance in wiring is increased resistance. In a circuit board 8 inches square, the fact that the wire has to make a bend has negligible effect on the resistance. In a spring reverb unit, the current is going through a tightly wound coil that is eight inches long - but actually represents about 30 inches of wire. That slows the current down to an extent because of the added resistance.
If the resistance of the wire is 30 ohms and the voltage between the two ends of the wire is 45 volts,then the current through the wire isI = E/R = (45/30) = 1.5 amperes.