# What is resistance?

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.

----

**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.

----------

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

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Infinite resistance is resistance obtained across an open circuit. Read More

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### What is the cause of resistance and how the resistance and how the resistance of a wire can be determined?

Electrical resistance can be determined by the equation that defines resistance - Ohm's Law. Just divide the voltage across a resistor, by the current passing through it. Read More

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Resistance can be changed by strain over time and changes in the temperature. Resistance thermometers are sensors that are used to measure temperature by correlating the resistance of the RTD elements. Read More

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resistance is useful when a plane is flying in the air, air resistance. it is also useful when a boat is floating on water, water resistance. Read More

### Is graphite a high resistance or low resistance of electricity?

Graphite is low resistance of electricity... Read More

### Resistance in a series circut is?

resistance of a series circuit is sum of the individual resistance in the circuit. Read More

### Resistance in a sentence?

Resistance forces were hopeless. The Resistance of people forced collapse of government. Read More

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### Define Internal Resistance?

The internal resistance of a device is the resistance in ohms of that device. It is the resistance electrons need to overcome before electricity is said to flow. Read More

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Bulk resistance of diode depends on how it is biased. The bulk resistance of a diode is the approximate resistance of the diode when it is forward biased. Read More

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The resistance of a tungsten light bulb is greater than the resistance of a copper wire. In addition, as the bulb get hotter, the resistance increases, due to the positive resistance to temperature coefficient of the filament. Read More

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There is no such a thing as infinite resistance but it could be a very high resistance. Read More

### What is the relationship between resistance and conductance?

Resistance and Conductance are inversely related, Resistance= 1/Conductance. Read More

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

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the ants getting resistance to DDT while the humans not getting resistance to tobacco? the ants getting resistance to DDT while the humans not getting resistance to tobacco- why Read More

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When we pass A.C in any circuit they offered some resitance are called dynamic resistance & when we pass D.C in any circuit they offered some resistance are called static resistance Read More

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Resistance decade box is nothing but Resistance bank. It has various ranges of Resistance value ranging from few ohms to few mega ohms. In other terms, large value of resistance are fabricated in single box is said to be Resistance decade box. Read More

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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. Read More

### How do i calculate the total resistance of a series circuit?

The total resistance of a series circuit is the sum of all the resistances of each component within the circuit. Resistance(total) = Resistance(1) + Resistance(2) +... Read More

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Air resistance is a type of friction, and so it will always slow an object in comparison to if there never was air resistance. Read More

### Compute resistance for a circuit with resistance of 10 us?

This question makes no sense. You are asking for resistance and then saying the resistance is 10 us. "US" is not a measure of resistance. The measure is called Ohms. Ohm's Law states that Voltage = Current x Resistance Hence Resistance = Volts divided by Amps. Read More

### What is active resistance?

Active resistance is a violent way of protesting the government, unlike passive resistance, which is nonviolent. Read More

### What is self resistance?

Self resistance is exactly what it sounds like it would be. It is the resistance that you make happen on your own. Read More

### How the resistance is connected to voltmeter?

Resistance is connected in parallel with voltmeter or say, voltmeter is connected in parallel with resistance. Read More