The electricity that we use is the flow of electrons jumping from atom to atom within the atomic/molecular structure of the conducting material. Metals, like copper, commenly used for wires, have a dense molecular structure consisting of atoms that easily receive and release extra electrons. It does, however, require energy for an electron to pass through the space in between the atoms, resulting in a loss of energy. This loss of energy is mesured in resistance.
The longer the wire, the longer the chain of atoms an electron must jump between. Just like climbing a ladder, the longer the ladder, the more steps you must take to reach the end, and the more energy used.
when electrons move down a wire in electricity, the atoms (or ions technically) get in their way and cause resistance. the longer the wire, the more ions for the electrons to bump into on their path, and so, the greater the resistance
Resistance is the restriction of electrical flow in a component/wire/etc. If you think of a short fat wire as a short freeway and a long thin wire as a quiet country road then the answer is easy to find especially if you imagine 1 thousand cars all trying to travel the distance at once
-- A piece of wire behaves like a resistor. Granted, its resistance is very small, but it
has some.
-- Another piece of wire behaves like another resistor. Granted, its resistance is also
very small, but it has some.
-- When you twist one end of each piece of wire together, you get a longer wire.
Also, electrically, you have connected two resistors in series. As you know, the total
resistance of resistors connected in series is the sum of the individual resistances,
and is greater than either single resistance alone.
Wire has a specific resistance per distance. So if you increase the distance, the resistance of that particular wire will be greater.
There are more particle collisions between electrons and atoms
Short wire have less resistance compared to that of long provided both have the same area of cross section.
Shorter.
No. Other things being equal, a long wire has more resistance than a short wire.
A falling elephant encounters a greater force of air resistance than a falling feather does. The force of air resistance can't be greater than the weight of the falling object. When the force of air resistance is equal to the weight of the falling object, the object stops accelerating, its falling speed becomes constant, and the force of air resistance doesn't get any bigger. So the force of air resistance against a falling feather can't be greater than the weight of the feather. But the force of air resistance against a falling elephant can be, and undoubtedly is, greater than the weight of a feather.
A longer wire has a higher resistance, because there are more particles for the electrons going around to "hit", and therefore be slowed down from.
Drop a pound of feathers (in a bag) and a pound of lead from a height. The smaller mass of the lead will let it fall faster due to less air resistance, than the greater mass and much greater air resistance of the feathers.
Air friction and rolling resistance
No. Other things being equal, a long wire has more resistance than a short wire.
A long piece of wire will have more resistance in it than a shorter one of the same material.
A falling elephant encounters a greater force of air resistance than a falling feather does. The force of air resistance can't be greater than the weight of the falling object. When the force of air resistance is equal to the weight of the falling object, the object stops accelerating, its falling speed becomes constant, and the force of air resistance doesn't get any bigger. So the force of air resistance against a falling feather can't be greater than the weight of the feather. But the force of air resistance against a falling elephant can be, and undoubtedly is, greater than the weight of a feather.
Thinner wire has greater resistance than thicker wire, assuming the same amount of current.
"Better" depends on how much resistance you need for your circuit design.A short thick wire will have less resistance than a long thin wire of the same substance.Whether that's better or worse depends on how you plan to use the wire.
the long handle provides a greater lever effect
Aluminium wire has high resistance than Copper.
A longer wire has a higher resistance, because there are more particles for the electrons going around to "hit", and therefore be slowed down from.
As long or as short as you like. The only requirement is that the sum of any two sides must be greater than the third.
The parachutist will go down, of course. If gravity is greater than air resistance, then the parachutist would accelerate (his speed would increase). This would increase air resistance, up to the point where gravity and air resistance are in balance.
Thrust that is greater than Earth's gravity, and it must be sustained over a sufficiently long time. Alternately, the initial speed must be greater than the escape velocity.
the shunt generator wont be started .hehe