Grade 8 Electricity: Current vs. Voltage PDF

GRADE 8- QUARTER 1-(MELC’S: Electricity: Current vs. I N F E R T H E R E L AT I O N S H I P BETWEEN CURRENT AND V O LT A G E ) Voltage M A’ A M R O S A LY N L U R I Z G O Z O N  Objectives:...

GRADE 8- QUARTER 1-(MELC’S: Electricity: Current vs. I N F E R T H E R E L AT I O N S H I P BETWEEN CURRENT AND V O LT A G E ) Voltage M A’ A M R O S A LY N L U R I Z G O Z O N  Objectives: Students will be able to infer the relationship between current and voltage by explaining the direct proportionality between the two using Ohm's Law. Students will demonstrate appreciation for the role of electricity in daily life by reflecting on how the absence of electricity would impact modern living during class discussions. What do you know about Electricity? Current? Voltage?  How do you use electricity in your daily lives? "How does electricity affect our daily lives?" Electricity -the flow of electric charge, typically through wires, that powers devices, lights, and machinery essential for daily life. Electricity -electricity is generated by the movement of electrons, which are subatomic particles found in atoms.  Electricity: ATOMS ATOMS CONSIST OF PROTONS, NEUTRONS, AND This Photo by Unknown Author is licensed under CC BY-SA ELECTRONS. Question: What do you think will happen when an ELECTRON move from one Atom to another? Answer: it creates an electric current, which is the basis of electricity.  Some uses of Electricity Watch K-DRAMA Use the Computer to play Computer Game Internet Connection LRT and MRT The Quantities of Electricity Electric Current Voltage Resistance FLOW  Electric Current Electriccurrent is a measure of the number of electrical charges passing through a cross section of a conductor in a given time. The I symbol for current is capital letter. Unit used to measure electric current is Ampere (A).  Electric charges can be made to move through a conducting material  The direction of the flow of electrons is from the negative terminal to the positive terminal Ammeter MEASURES ELECTRIC CURRENT  Question: WHAT MAKES THE CHARGES MOVE IN CLOSED CIRCUIT? Answer: This voltage creates an In a closed circuit, electric field that charges flow due to pushes the electrons through the circuit, the presence of a causing the current to voltage provided by flow from the negative a power source, terminal to the positive such as a battery. terminal of the power source. Voltage Electric Pressure that causes current to flow.  Voltage The symbol for voltage is capital letter V. The unit, volts (V), is named after the Italian physicist Alessandro Volta A voltmeter measures voltage  BULB Switch Battery  Resistance It measures how much a material or component resists the movement of electrons. When electric charges flow through the wires and loads of the circuits they encounter resistance or a hindrance to their movement.  Resistance Materialslike rubber have high resistance, while metals like copper have low resistance, allowing current to flow more easily. Resistance is measured in ohms (Ω), and it causes electrical energy to be converted into heat. Formula for Current  V ÷ Voltage= Volts (V) ÷ I Current =Ampere (A) x R Resistance = Ohms (Ω) Example Example.3 A  V ÷ Voltage= Volts (V) ÷ I Current =Ampere (A) x R Resistance = Ohms (Ω) Example.3 A.9 V