Why does a bulb get dimmer when you add a second bulb in series? Why do the lights in your house stay bright when you switch on a fan? In this course we learn how current, voltage and resistance fit together. We start with Ohm's law and resistors in series and in parallel. Then we use Kirchhoff's two rules to solve circuits with more than one battery, and we let Python check our work. It is a solid base for Class 11 and 12 exams, and for JEE and NEET circuit questions.
3 lessons, about 1 h 25 min4 simulations6 problems6 practice questionsPython in every lesson
Ohm's law links voltage, current and resistance. We use it to find the total resistance of resistors in series and in parallel.
The junction rule and the loop rule let us solve circuits that series and parallel rules cannot.
A real cell loses some of its emf inside itself, so its terminal voltage falls as it drives more current. Cells add up in series and share the load in parallel. A battery gives the most power to a load equal to its internal resistance. A balanced Wheatstone bridge finds an unknown resistance from three known ones.
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