Resistance is the opposition to flow or movement.

Resistance in a a mechanical system could be friction, wind, gravity.

Resistance can be opposition to a policy, or to an invasion (e.g. French Resistance).

Resistance in an electrical circuit is the limiting or opposition to current flow. It is measured in Ohms.

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Electrical Resistance

The technical definition is "Electrical resistance is a ratio of the degree to which an object opposes an electric current through it, measured in ohms."

In simplfied terms, electrical resistance is broadly equivalent to friction in a mechanical system. If you applied a voltage to a circuit with zero resistance then you would get an infinite current. In reality all circuits have some resistance which limits the current.

We can predict the current in a given circuit using Ohms law:

V = I x R

Where:

V is Voltage (measured in Volts)

I is current (measured in Amps)

R is resistance (measured in Ohms)

You will often see this in the form E = I x R. It is exactly the same thing, just a different convention where "E" is used for voltage instead of "V"

Ohms law is:

V=I/R

V=Voltage (volts)

I=Current (amps)

R=Resistance (Ohms)

Resistance in an AC circuit is called Impedance (Z)

Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit.

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Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit.

There are many different types of resistance, and I recommend that for starters you read up on the Wikipedia article on electrical resistance.

http://en.wikipedia.org/wiki/Electrical_resistance

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B - Dynamic resistance

abrasion resistance is the resistance in abrasion

The theoretical resistance simply defines what resistance is while practical resistance refers to putting the theoretical resistance into action.

Resistance is resistance , no matter if it is contact resistance or any other resistance. And formula is R = V / I.

Resistance can be increased by adding a resistance in series with the existing load resistance.

The laws of resistance describes the resistance of a specific material. There are a total of four laws of resistance.

Low resistance: Copper wirehigh resistance : rubber band

lower than the low resistance....

The total resistance of the circuit increases. hence the new resistance after adding the resistance will be new resistance = old resistance + added Resistance There is a small mistake in the question. The second word is 'changes' not 'charges'

low resistance.

zener resistance of a zener diode is the resistance of the zener diode but which is the resistance of a diode

Resistance is measured in Ohms.Resistance is measured in Ohms.Resistance is measured in Ohms.Resistance is measured in Ohms.

On Circuit Resistance = Close to the total load Resistance. Off Circuit Resistance = Near Infinitive High Resistance.

this are those resistance hos values can not be changed under this categoric tow types of resistance. 1.carbon resistance. 2.whire wound resistance.

output resistance decreases and input resistance increases

Hot resistance is your total resistance you can have with out exceeding your wattage limit

Infinite resistance is resistance obtained across an open circuit.

my friend had resistance when he fell of his jumper. or, My watch is water resistance.

Metals heat up as electrical currents flow through them. Cold resistance is the metals resistance before it is operating. Hot resistance is the metals resistance after operating time has elapsed some.

Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.Energy is gradually lost, through air resistance, and resistance in the string.

Resistance = R.

what was the apache resistance

AC resistance = DC resistance. Only the reactance changes with frequency...

Short wire has less resistance Long wire has more resistance Thick wire has less resistance Thin wire has more resistance