lab 4 - Lab 4 DC Circuits Electric Power Abstract The purpose of the experiment was to demonstrate the properties of power and efficiency in a real

lab 4 - Lab 4 DC Circuits Electric Power Abstract The...

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Lab 4: DC Circuits: Electric PowerAbstractThe purpose of the experiment was to demonstrate the properties of power and efficiency in a real power source and an ideal power source. The difference between a real and an ideal power source is that a real power source has no internal resistance. Resistance is defined as the quantity that reduces flow and is measured in Ohm’s (Ω). Joule’s law was used to calculate the power dissipated by the source resistor and the load resistor. Joule’s law, PIV,was the formula used for power in terms of voltage and current. Electrical power is defined as the rate at which energy is transferred. Electrical efficiency is defined as the amount of useful power output divided by the amount of power inputted. The tools used for the experiment were a DC power supply, voltmeter, ammeter, resistance box, computer with Logger Pro software, and red and black banana wires. In Part I the principles of power and efficiency were successfully demonstrated for an ideal power source. In Part II, the experimental and theoretical efficiencies were calculated for the circuit in the real power source and showed a 4% error between the

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