hi

hi

Resistance

The property of a substance or material which oppose the flow of electricity through it is called resistance OR,

Resistance is the ability of a circuit or element (which is called resistor) to oppose current.

Examples of Resistors with the ability of high resistance are Wood, Air, Mica, Glass, Rubber, Tungsten etc.

Unit of Resistance is “Ohm” and it is denoted by ? and it is represented by “R”.

difference between AC and DC Resistance

AC Resistance

In Simple words, Resistance in AC circuits is called Impedance. Or

The Overall resistance (Resistance, Inductive reactance and Capacitive reactance) in AC circuits is called Impedance (Z).

Explanation:

When AC Current pass through a wire (resistor, inductor), then current produces a magnetic field across that wire which opposes the flow of AC Current in it along with the resistance of that wire. This oppose cause is called Inductance or Inductance is the property of Coil (or wire) due to which opposes any increase or decrease of current or flux through it. Also, we know that inductance is only exist in AC because the magnitude of current continuously changing

Inductive Reactance XL, is the property of Coil or wire in an AC circuit which opposes the change in the current. The unit of Inductive reactance is same as Resistance, capacitive reactance i.e. Ohm (?) but the representative symbol of capacitive reactance is XL.

Likewise,

Capacitive Reactance in a capacitive circuit is the opposition to current flow in AC circuits only. The unit of capacitive reactance is same as Resistance, Inductive reactance i.e. Ohm (?) but the representative symbol of capacitive reactance is XC.

Measuring AC Resistance

hi

When AC Current pass through a wire (resistor, inductor), then current produces a magnetic field across that wire which opposes the flow of AC Current in it along with the resistance of that wire. This oppose cause is called Inductance or Inductance is the property of Coil (or wire) due to which opposes any increase or decrease of current or flux through it. Also, we know that inductance is only exist in AC because the magnitude of current continuously changing

Inductive Reactance XL, is the property of Coil or wire in an AC circuit which opposes the change in the current. The unit of Inductive reactance is same as Resistance, capacitive reactance i.e. Ohm (?) but the representative symbol of capacitive reactance is XL.

Likewise,

What is the difference between AC and DC Resistance & How to calculate it?. Available from: https://www.researchgate.net/post/What_is_the_difference_between_AC_and_DC_Resistance_How_to_calculate_it2 [accessed Jun 6, 2015].

The resistance of a conductor is determined by the length, cross-sectional area, and resistivity of the conductor. Since temperature affects resistivity, resistance is indirectly affected by temperature.

Resistance is directly-proportional to the length of the conductor and inversely-proportional to its cross-sectional area, and resistivity is its constant of proportionality. If the length of the conductor is expressed in metres, and the cross-sectional area is expressed in square metres, then resistivity is expressed in ohm metres. Using American units of measurements, however, where length is expressed in feet and cross-sectional area in circular mils, resistivity is normally expressed in 'ohm circular mill per foot' (not, as often seen in textbooks: 'ohms per circular mil foot'!).

In the case of d.c. current, the charge carriers distribute themselves across the entire cross-sectional area of the conductor. In the case of a.c. current, however, due to what is known as the 'skin effect', there is a tendency for the charge carriers to move closer to the surface of the conductor -this acts to reduce the effective cross-sectional area of the conductor and, thus, raise its resistance. So a conductor's resistance to a.c. is somewhat higher than it is to d.c., and is generally termed its 'a.c. resistance'. A.C. resistance increases with frequency (and should not be confused with 'reactance' or 'impedance').

Hi

The property of a substance or material which oppose the flow of electricity through it is called resistance OR,Resistance is the ability of a circuit or element (which is called resistor) to oppose current.

Examples of Resistors with the ability of high resistance are Wood, Air, Mica, Glass, Rubber, Tungsten etc.

Unit of Resistance is “Ohm” and it is denoted by Ω and it is represented by “R”.

Hi

AC Resistance

In Simple words, Resistance in AC circuits is called Impedance. Or

The Overall resistance (Resistance, Inductive reactance and Capacitive reactance) in AC circuits is called Impedance (Z).

Explanation:

When AC Current pass through a wire (resistor, inductor), then current produces a magnetic field across that wire which opposes the flow of AC Current in it along with the resistance of that wire. This oppose cause is called Inductance or Inductance is the property of Coil (or wire) due to which opposes any increase or decrease of current or flux through it. Also, we know that inductance is only exist in AC because the magnitude of current continuously changing