Grade 7 Physics

Physics 7 Lesson 30: Summary of Chapter III Electricity 1. Summary of theory Tóm 1.1. It is possible to electrify objects by rubbing 1.2. There are two types of electric charge - Negative charge ( – ) and positive charge ( + ) Interaction between charges: the same type repels each other, different types attract each other. Interaction … [Read more...] about Physics 7 Lesson 30: Summary of Chapter III Electricity

Physics 7 Lesson 29: Safety when using electricity 1. Summary of theory Tóm 1.1. Electric current through the human body can be dangerous - Human (or animal) bodies are conductors of electricity. So when touching an electrical circuit, in the human (or animal) body, an electric current will flow through. It can then cause muscle convulsions, cardiac … [Read more...] about Physics 7 Lesson 29: Safety when using electricity

Physics 7 Lesson 28: Practice Measuring amperage and voltage for parallel circuits 1. Summary of theory Tóm 1.1. Experiment target Knowledge: Know how to connect 2 light bulbs in series. Skills: Practice measuring and detecting the law of amperage and voltage in a circuit connected in series with 2 bulbs. attitude: Good sense in practice … [Read more...] about Physics 7 Lesson 28: Practice Measuring amperage and voltage for parallel circuits

Physics 7 Lesson 27: Practice: Measure amperage and voltage for a series circuit 1. Summary of theory Tóm 1.1. Experiment target Knowledge: Know how to connect 2 light bulbs in series. Skills: Practice measuring and detecting the rules of electricity and electricity in the circuit connected in series with 2 bulbs. attitude: Good sense in practice … [Read more...] about Physics 7 Lesson 27: Practice: Measure amperage and voltage for a series circuit

Physics 7 Lesson 26: The potential difference between the two ends of the power tool 1. Summary of theory Tóm 1.1. The potential difference between the two ends of a power tool In a closed circuit, the potential difference between the two ends of a conductor causes an electric current to flow through that conductor. - For a certain conductor (light … [Read more...] about Physics 7 Lesson 26: The potential difference between the two ends of the power tool

Physics 7 Lesson 25: Voltage 1. Summary of theory Tóm 1.1. Voltage - An electric source creates a potential difference between its two terminals. The potential difference is denoted by the letter U. - The unit of measurement of voltage is the volt, symbol is V. + For voltage difference with small value, people use the unit millivolt, symbol mV. 1 … [Read more...] about Physics 7 Lesson 25: Voltage

Physics 7 Lesson 24: Amperage 1. Summary of theory Tóm 1.1. Amperage a) Experiment b) Amperage 1.2. Ammeter An ammeter is an instrument for measuring electric current. - Symbols: A and mA - When using an ammeter to measure amperage, attention should be paid to: Choose an ammeter with a GHG suitable for the results to be measured, the smaller the DCN … [Read more...] about Physics 7 Lesson 24: Amperage

Physics 7 Lesson 23: Magnetic effects, chemical effects and physiological effects of electric current 1. Summary of theory Tóm 1.1. Word effect a) Magnetic properties of magnets Magnets have magnetic properties because they have the ability to attract objects made of iron or steel. Magnets have the ability to rotate magnet needles. Each … [Read more...] about Physics 7 Lesson 23: Magnetic effects, chemical effects and physiological effects of electric current

Physics 7 Lesson 22: Heat and luminous effects of electric current của 1. Summary of theory Tóm 1.1. Heat effect - Current passing through all normal conductors causes the conductor to heat up. Application of the heating effect of electric current: Manufacturing irons, electric stoves, incandescent lamps, rice cookers,... Making fuses used … [Read more...] about Physics 7 Lesson 22: Heat and luminous effects of electric current của

Physics 7 Lesson 21: Circuit diagram- Current direction 1. Summary of theory Tóm 1.1. Map of electric a) Symbols of some electrical circuit parts - In order to simply describe electrical circuits and wire them up according to the requirements, people use symbols representing parts of the circuit to draw diagrams for the circuit. Example: Using … [Read more...] about Physics 7 Lesson 21: Circuit diagram- Current direction