Notes of Chapter 13: Current Electricity of “Physics XII” for FSc Part 2 published by Punjab Textbook Board, Lahore. These notes are very helpful to prepare Physics paper of FSc Part 2 for Federal Board, Multan Board, Faisalabad Board, Sargodha Board, Gujranwala Board, DG Khan Board, Rawalpindi Board or any other board of Punjab, Pakistan.

#### Summary and Contents

The amount of electric charge that flows through a cross section of a conductor per unit time is known as electric current.If ∆Q is the amount of charge flow through a cross-section in time ∆t , then the electric current I is described mathematically as I=∆Q/∆t.

• Electric current
• Current direction
• Conventional current
• Electronic current
• Current through metallic conductor
• Current without battery
• Current with battery
• Drift velocity
• Source of current
• Types of Source of current
• Effects of current
• Electroplating
• Ohm`s Law
• Ohmic
• Non Ohmic
• Semiconductor diode
• Combinations of resistors
• Difference b/w Resistance and resistivity
• Conductance
• Colour code for carbon resistances
• Rheostat
• Thermistors
• Electric power
• Electromotive force
• Potential difference
• Kirchhoff`s Law
• Circuit problems
• Wheatstone bridge
• Applications of Wheatstone bridge