UNIT 12. ELECTRICITY

At the end of this unit the student should be able to:

- Define electric current as the rate of flow of charge

- Understand some reasons for the conventional direction of electric

  current

- Explain the term emf (electromotive force) and what is a source

  of emf

- Define resistance and the factors affecting the resistance of a

  conductor

- State and apply Ohm’s law

- Understand and apply the equation of electric power as the rate of

  energy transferred in the form of heat

- Draw schematic diagrams of circuits including measuring devices

  such as ammeters and voltmeters

- Analyze series and parallel circuits and demonstrate proficiency in

  calculations of equivalent resistance, current and voltage drop

­ Calculate the terminal voltage taking into account the internal

  resistance of a battery

- State and apply Kirchhoff’s laws to solve complex networks

- Analyze circuits with resistors and capacitors (steady state) and

  demonstrate proficiency in calculations of equivalent resistance,

  current and voltage drop