circuits_worksheet M.C (1)

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Florida Virtual School *

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Electrical Engineering

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Nov 24, 2024

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Circuits Worksheet Name: Part 1 Questions (20 points) 1. You have a battery and a light bulb. What else must you have to complete the circuit to light the bulb. Why is this component necessary? Wires connecting the battery and the light bulb are required to complete the circuit and light the bulb. Conducting cables are required because they offer a channel for electric current to go from the battery to the light bulb. Without the wires, electrons cannot move from the positive terminal of the battery to the filament of the light bulb, and therefore the circuit stays incomplete. 2. How is a parallel circuit different from a series circuit? Provide an example to support your statement. A series circuit connects components end-to-end in a single loop, allowing electricity to flow along only one path. A parallel circuit, on the other hand, has components linked in many branches, allowing various channels for electricity to flow. Example: Christmas lights are linked in series in this circuit. If a single bulb fails, the entire string becomes dark because electricity cannot flow. Home electrical outlets form a parallel circuit. Because each device has its own distinct channel to the power source, if one device is disconnected or malfunctions, it has no effect on the operation of other devices attached to the same power source. 3. What is the role of resistance in an electrical circuit? Provide an example to support your statement. The passage of electric current is restricted in an electrical circuit by resistance. It is a material and component property that is measured in ohms. The greater the resistance, the more difficult it is for current to pass through. When you switch on an incandescent light bulb, the filament within provides resistance to the passage of energy. Because of this resistance, the filament heats up and emits light. When the resistance is increased (for example, by adopting a higher resistance filament), the bulb glows less brightly because less current flows through the circuit, resulting in reduced power dissipation and less light output. 4. Ohm’s law is represented by the following equation I = V R Explain how the current would change if the amount of voltage increased, but resistance stayed the same. Ohm's law (I = V/R) states that if the voltage (V) increases while the resistance (R) remains constant, the current (I) in the circuit increases as well. In other words, when resistance is constant, voltage and current are directly proportional. If the voltage is doubled, the current will double as well, providing the resistance remains constant. Unless Otherwise Noted All Content © 2022 Florida Virtual School

Part 2 Circuit Design (20 points) Part 2 Questions (20 points) 1. Is the circuit you created a parallel, a series, or a series/parallel circuit? Support your answer with a description of this type of circuit. The preceding circuit is a series circuit. A series circuit connects components end-to-end in a single loop, creating just one route for electricity to flow. If the circuit is broken at any point (for example, by opening the switch), the entire circuit becomes open, and current ceases to flow through all components. 2. If you were to add two more resistors to your circuit, but your voltage source stayed the same, how will this affect the current in circuit? To support your statement, provide an example of how this will affect your device. Adding two additional resistors in series to the circuit increases the overall resistance. According to Ohm's rule (I = V/R), if resistance rises while voltage remains constant, current falls. For example, adding two more resistors to the circuit raises the overall resistance. As a result, the current flowing through the circuit diminishes, and the light bulb (load) becomes dimmer since less current passes through it. 3. Describe the role of the switch in an electrical circuit. A switch in an electrical circuit acts as a control device, allowing the circuit to be opened or closed. When the switch is closed (turned on), current flows across the circuit, allowing linked devices or components to function. When the switch is open (turned off), it prevents the flow of current, essentially disconnecting the circuit and preventing electricity from reaching the devices. Switches are necessary for managing the functioning of electrical equipment as well as conserving energy when the devices are not in use. 4. Describe the path of electric current through your circuit. Electric current travels through the components in a single, continuous loop in a series circuit. The current flows as follows through the described circuit: Current begins at the battery's positive terminal. If the switch is closed, it flows through it. It then travels in series through the light bulb (or load). Finally, the current returns to the battery's negative terminal, completing the circuit. The switch determines whether or not current may flow through the remaining components. When the switch is Unless Otherwise Noted All Content © 2022 Florida Virtual School

turned off, no current flows and the circuit is closed. When the switch is turned off, current travels through the complete loop, supplying electricity to the light bulb or load. Unless Otherwise Noted All Content © 2022 Florida Virtual School

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