Some math and electrical vocab
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This document defines key electrical terms such as voltage, current, circuits, and power sources. Voltage refers to the difference in electric potential, current is the flow of electrons through a material, and circuits require a power source, conducting path, switch, and load. Circuits can be connected in series with current passing through components sequentially, or in parallel where current divides into multiple paths before recombining.
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Simple circuit diagram
This document provides an overview of series and parallel circuits. It defines a circuit as a closed loop that allows current to flow from a power source through a load. A series circuit has one path for current to flow through all loads sequentially. In a parallel circuit, there are multiple paths for current, so the current divides across branches while the voltage remains the same across each branch. Key differences between series and parallel circuits are explained, with current remaining constant in series but voltage constant in parallel.
Circuits
A circuit is a closed loop that allows electric charges to flow continuously from the positive terminal of a battery or other energy source, through external components, and back to the negative terminal. For a circuit to work, it must include an energy source that establishes a potential difference to drive the movement of charges along a conducting loop between the source's terminals. Common circuit components include batteries, wires, light bulbs, and resistors, with circuits classified as either series or parallel depending on how the components are connected.
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Series circuits have a single path where the same current flows through all loads. Parallel circuits have multiple branches where the current divides among the paths. Circuits can be either series, where there is one single current path, or parallel, where the current divides among multiple branches.
Simple circuit with activity
Here are the steps to find the relationship between voltage, resistance, and current in a circuit:
1. Construct a simple circuit using the materials provided with one dry cell, one resistor, and connecting wires. Use alligator clips to securely connect the components.
2. Use a multimeter to measure the voltage of the dry cell. Record this value.
3. Measure the resistance of the resistor. Record this value.
4. Connect the multimeter in series with the resistor to measure the current. Record this value.
5. Use Ohm's Law formula (V=IR) to calculate the current using the measured voltage and resistance. Compare this calculated current value to the measured one.
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El documento describe los materiales comunes utilizados para fabricar varios objetos domésticos como una silla, sartén, libro, cable y chaqueta. Explica que la madera y el plástico son buenos materiales para sillas, el metal para sartenes debido a su conductividad térmica, el papel y cartón para libros por su flexibilidad y bajo peso, el cobre recubierto de plástico para cables por su conductividad eléctrica y aislamiento, y la tela para chaquetas por su aislamiento térmico y flexibil
Materials ok - theory and example (chair)
The document discusses why different materials are used to make different objects. It notes that materials have various characteristics like properties, price, appearance, and environmental impacts that determine their suitability. These characteristics include color, strength, flexibility, conductivity, and more. The document then asks which materials would be best for some common objects like a chair, pan, book, and wire, based on the materials' properties.
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Some math and electrical vocab
- 2. voltage
- 3. plus
- 5. multiplied by / times
- 6. Electric current • The flow of electrons through a material.
- 7. Electrical circuit • Composed of individual power source, conducting path, switch and load
- 8. Power source • A supply of moving electrons
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