====== Chapter 13: Current Electricity ======
{{ :fsc-pctb-12:notes:fsc-pctb-12-notes-ch13.jpg?nolink&600|Chapter 13: Current Electricity}}
This is a thirteenth chapter of the book Physics 12 published by Punjab Curriculum and Textbook Board, Lahore, Pakistan.

After studying this chapter, the students will be able to:

  * Understand the concept of steady current.
  * Describe some sources of current.
  * Recognize effects of current.
  * Understand and describe Ohm's law.
  * Sketch and explain the current-voltage characteristics of a metallic conductor at constant temperature, diode and filament lamp.
  * Understand resistivity and explain its dependence temperature.
  * Understand and and elaborate conductance and conductivity of conductor.
  * Solve problems relating the variation of resistance with temperature for one dimension current flow.
  * Know the value of resistance by reading co-lour code on it.
  * Know the working and use of rheostat in the potential divider circuit.
  * Describe the characteristic the of thermistor.
  * Use the energy considerations to distinguish between emf and p.d.
  * Understand the internal resistance of sources and its consequence for external circuits.
  * Describe the conditions for maximum power transfer.
  * Know and use the application of Kirchhoff's first law conservation of charge.
  * Know and use the application of Kirchhoff's second law as conservation of energy.
  * Describe the function of Wheatstone Bridge to measure the unknown resistance.
  * Describe the function of potentiometer to measure and compare potential without drawing any current from the circuit.

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| **Question**: |{{ :fsc-pctb-12:notes:fsc-pctb-12-questions-ch13.pdf |Download PDF}} |
| **Numerical**: |{{ :fsc-pctb-12:notes:fsc-pctb-12-numericals-ch13.pdf |Download PDF}} |
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{{tag>FSc FSc_Part2 PCTB Notes}}