Wed April 16, 2014 By: Shomyajit Misra Misra

which derivations will come from chapter current electricity in exams?

Expert Reply
Wed April 16, 2014
There are no certainties in any examination as to which questions might come, however the following derivations are very important from the exam point of view:
1) Expression of current density in the form of Ohm's law
2) Equivalent resistance of a combination of resistors in series or parallel
3) The balance condition in a wheatstone bridge
4) Internal resistance of a cell by potentiometer
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