Conductance. by Fatima Asif (LCWU). pptx

All basic information about conductance

1. CONDUCTANCE

2. 01 Defination of conductance 02 Symbol and formula of conductance 03 Conductance\ conductivity 04 Ohm Law 05 Factors 06 Types of conductance Content 07 Measurment of conductanc e

3. Conductance Conductance is a measure of the ease with which electric current flows through a material. It is the reciprocal of electrical resistance. The higher the conductance, the easier it is for electricity to pass through the material. Conductance is essential in various fields such as electronics, physics, and chemistry.

4. Symbol and formula of conductance Symbol: G Formula : G=1\R (Where R is the electrical resistance in ohms (Ω). Unit : Siemens (S) 1 Siemens (S) = 1mho 1S = 1 Ω -1

5. Difference between Conductance: The ease with which electric current passes through a mater ial. Symbol: G Unit : Siemens (S) Conductivity: Intrinsic property of a material describing its ability to conduct electricity. Symbol = σ Unit = S/m (Siemens per meter)

6. Ohm law Ohm's Law and conductance are closely related concepts in the field of electrical circuits and conductivity. Ohm's Law states that the electric current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points, and inversely proportional to the resistance (R) of the conductor. Mathematically, Ohm's Law is expressed as: V = I . 𝑅 or I = V \ R ----------------- 1 as Conductance is G = 1\R which can be written as R = 1\G- -----------------2 combine eq 1 and 2 we get : I = V . G This equation shows that the current (I)lowing through a conductor is directly proportional to the voltage(V) and the conductance (G) of the conductor.

7. Types of conductance Equivalent conductance: The conductance of all the ions produced from 1g equivalent of electrolyte dissolved in Vcm 3 of the solution when the distance between the electrode is 1cm and area is large called as equivalent conductance. The symbol for equivalent conductance is Λ . Its unit is Ω -1 cm 2( g) Specific Conductance: The conductance of unit volume of a cell is called specific conductance.The unit of specific conductance is Ω-1 m . The symbol used to represent specific conductance is K

8. Types of conductance Molar conductance : It is the conductivity of the solution produced by the conductance of all the ions from one mole of electrolyte dissolved in Vcm3 of the solution is called as molar conductance. The unit of molar conductivity is ohm -1 cm2 .mol -1 . It is denoted by the symbol Λ m

9. Factors effect conductance Material Temperature Length and Cross-Sectional Area Presence of Magnetic Fields Cross-Sectional Shape Pressure and Strain Presence of Free Electrons or Charge Carriers

10. Conductance Meter: Measures direct current (DC) or alternating current (AC) conductance. Conductance Bridge: Compares unknown conductance with a known standard. Measurement of Conductance

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