6.01 Lecture Notes - Lecture 4: Thai Baht
22 May 2016
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In conventional english, a circuit is a path or route that starts at one place and ultimately returns to that same place. In electronics, a circuit is a closed path through which electrical current can ow. Three parts of the ashlight comprise the circuit: The bulb produces light when connected to the power. The switch which can either be on, meaning it is connected, or off, meaning it is disconnected. When the switch is open, there is no path for current to ow. Electrical circuits are made up of components, such as resistors, capacitors, inductors, and transistors, connected together by wires. Our electrical abstraction is based on two major types of pieces: nodes and components. In general, a circuit consists of several components connected by nodes. Voltage is a difference in electrical potential between two different nodes in a circuit. Ground node is the point on a circuit that we pick to use as reference.
