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.
There are two ways to elongate a piece of wire: Either stretch it, or attach another piece onto one end of it. Either way, the resistance will increase.
Wire is not equal to resistance. If you have two pieces of wire with the same thickness, composition, and temperature, the longer piece has higher electrical resistance.
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).
If two pieces of wire are made of the same material and have the same length but different resistance, then the one with the greater cross section area has the lower 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.