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Circuit diagrams are a pictorial way of showing circuits. Electricians and engineers draw circuit diagrams to help them design the actual circuits. Here is an example circuit diagram.
This is the Ammeter symbol.
This is the Voltmeter symbol.
This is the resistor symbol.
This is the battery symbol
Series and parallelelectrical circuits are two basic ways of wiring components. The naming describes the method of attaching components
A series circuit is one that has a single path for current flow through all of its elements.
A parallel circuit is one that requires more than one path for current flow in order to reach all of the circuit elements.
To find the current, use Ohm's law
To find the voltage across any particular component
To find the total current, I, use Ohm's Law
To find individual currentIi= V/Ri
To find VOLTAGE V= IiRi