Golden Education

Other note source Quiz 1:   Fullscreen Mode ⚡ ELECTROMAGNETIC EFFECTS ⚡ 📖 Section 18.1: Electromagnetic Induction Definition Electromagnetic Induction is the process by which an induced electromotive force (e.m.f.) is produced in a conductor due to a changing magnetic field. Faraday's Discovery (1831) Michael Faraday discovered that a changing magnetic field produces an induced current in a conductor. This was the opposite of what was already known - that current produces a magnetic field. Faraday's Experiment Faraday's Electromagnetic Induction Experiment N S Coil G Bar Magnet Solenoid Galvanometer Observations from Faraday's Experiment Action Galvanometer Reading Magnet moves INTO coil Needle deflects in ONE direction ...

Other note source Quiz 1:   Fullscreen Mode Quiz 2: Fullscreen Mode Electrical Circuits and Electrical Safety A Complete Guide for Grade 7 Students 17.1 Circuit Diagrams and Components Circuit diagrams use symbols to represent electrical components. This makes it easier to design and understand circuits. Symbol Name Function Cell Single battery (1.5V). Long line = positive (+), short line = negative (-) ...

Quiz 1:   Fullscreen Mode Chapter 16: Electrical Quantities – Theory and Formulas 16.1 Electric Charge Atoms contain: Protons – Positive charge Neutrons – No charge Electrons – Negative charge An atom is neutral when it has equal numbers of protons and electrons. Charging by Friction Electrons transfer from one material to another. The material that loses electrons becomes positively charged, and the one that gains electrons becomes negatively charged. Interaction of Charges Like charges repel Unlike charges attract Conductors and Insulators Conductors : Allow electrons to move freely (e.g., metals) Insulators : Hold electrons tightly (e.g., plastic, glass) 16.2 Electric Field An electric field is a region where a charge experiences a force. Field Line Directions Positive charge : Field lines point away Negative charge : Field lines point toward Field Strength Stronger where field lines are closer together. ...

Quiz 1:   Fullscreen Mode Quiz 2:   Fullscreen Mode Fenomena Sederhana Magnetisme 15.1 Magnet dan Sifat-sifatnya Definisi Magnet Magnet adalah benda yang dapat menghasilkan gaya magnet sehingga mampu menarik atau menolak benda lain tanpa bersentuhan. Sifat Utama Magnet Menarik bahan magnetik (besi, baja, nikel, kobalt). Mempunyai dua kutub: Kutub Utara (N) dan Kutub Selatan (S) . Kekuatan terbesar ada di kutub-kutubnya. Jika digantung bebas, selalu sejajar utara–selatan bumi . Like poles repel (N–N atau S–S tolak-menolak) dan unlike poles attract (N–S tarik-menarik). Bahan Magnetik vs Non-magnetik Bahan Magnetik Bahan Non-magnetik Besi, Baja, Nikel, Kobalt Aluminium, Tembaga, Plastik, Kayu Induksi Magnet Bahan magnetik dapat menjadi magnet sementara ketika berada di dekat magnet. Proses ini disebut induksi ; kutub yang terbentuk selalu berlawanan dengan kutub mag...

Quiz 1:   Fullscreen Mode Chapter 12: Light Physics - Complete Guide Chapter 12: Light Physics - Complete Theory and Formulas Introduction to Light Light is a form of electromagnetic wave that allows us to see objects around us. Objects can be classified as: Luminous objects: Produce their own light (e.g., lamp, fire) Non-luminous objects: Reflect light from other sources (e.g., wall, picture) 12.1 Reflection of Light The Law of Reflection Two fundamental principles: The angle of incidence (i) equals the angle of reflection (r) The incident ray, reflected ray, and normal all lie in the same plane Law of Reflection Formula: i = r ...