Thursday, February 16, 2012
Circuits
This week in Physics we learned more about Electric Current, Resistance, and Power. I learned that when you measure voltage, you have to make a path so you must measure across. When you measure current, you must break the past, so you have to break the path. Voltage is the electric potential difference between 2 points and is measured across what you are trying to measure (making a bridge). Current through is when the current will flow through the multimeter "like water" arranged in path before the object you are going to measure. A voltmeter makes a new path, an ammeter measures the current, breaking the path, and an ohmeter measures resistance out of the circuit. A series circuit is one path. It is the sum of the voltage drop across each resistor and it will equal to the total from the voltage source. On the other hand, a parallel circuit is a multi path circuit. Each resistor has the same amount of voltage and is not broken down into components. I related this to a type of voltage source used to charge multiple things at once. I'm not exactly sure if this is the right concept but I think that because this voltage source is connected to the original source, it creates a parallel circuit. Because multiple things can charge at once, it gives the same amount of voltage making it a parallel circuit.
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