when a piece of wire is longer why is the resistance greater?

Answer 1

Remember that resistance is the amount of current generated relative to a specific voltage. Remember that the longer a conductor is, the further that voltage must travel along the wire. The electric field strength in a wire (which drives the electrons) is given by the equation

E = V/L

Where E is the field strength
V is the voltage
L is the length of the conductor

The force exerted on the electrons is proportional to the E field strength, not the voltage. Because the conductor is longer, for a given voltage the E field is reduced. Note that electrons in a conductor actually move rather slowly. The velocity is called the drift velocity (see the Wikipedia article below). Note that the drift velocity of an average electron is quite different from the propagation speed of a wave along a conductor, which is usually close to the speed of light.

Answer 2

Normaly u can find that wire has a resistance of X ohm per 1000 ft.

Answer 3

if a piece of wire is longer the resistance is greater because resistance is directly proportional to length of the conductor and is inversly proportional to area of the conductor

Answer 4

Because the electricity has to travel through more material than it would with a shorter wire.

Also depends on what kind of material you are putting it through too.

Answer 5

Here specific resistance S=(RA/L)
Then Resistance R=SL/A
Then 'R' is proportional to 'L'.
So if L increased,then R will be Increased.

Answer 6

i like to think of wire as a corridor of people, the longer it is, the harder its going to be to get through the corridor