Before viewing the video below, let me give you some key points.

We will begin our discussion with connection constraints when we start connecting elements, such as voltage sources (batteries), current sources and resistors. When connecting elements, certain behavior must hold true.

The first constraint is Kirchoff’s Voltage Law (KVL). Kirchoff’s Voltage Law (KVL) states the sum of the voltage rise is equal to the sum of the voltage drops. Since voltage is an energy parameter then this is a form of the conservation of energy principle.

The other constraint is Kirchoff’s Current Law (KCL). Kirchoff’s Current Law (KCL) says at any point in a circuit where element devices are connected to a point called a node, then the sum of the incoming currents is equal to the outgoing currents. KCL is a conservation of charge principle.

Along with KVL and KCL you will need Ohm’s Law to calculate the voltages and currents for these devices.

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