Class 8 General Science MCQs Part 13| Electricity, Current, Voltage, Resistance & Safety Devices
Class 8 General Science MCQs Part 13| Electricity, Current, Voltage, Resistance & Safety Devices In this detailed and engaging video, we explore Class 8 General Science (Part 13) based on the latest curriculum, focusing on the concept of electricity, electric current, voltage, resistance, power, fuses, circuit breakers, and safety wiring systems. Perfect for ETEA, PST, CT, PET, DM, and other competitive exam preparation, this video covers all key questions with answers and explanations in simple Urdu and English. 📚 Topics Covered in This Video (30+ Concepts): 1. Why do appliances like washing machines need electricity? 2. Effect of power interruption on electrical devices 3. Definition and SI unit of electric current 4. Symbolic representation of current (I) 5. Relationship between Ampere and Coulombs/second 6. Measuring small currents – milliampere and microampere 7. What causes current to flow in a wire? (Voltage) 8. Voltage and its symbol (V) 9. Effect of increased voltage on current (Direct relation) 10. Analogy of voltage and current using water tank system 11. Difference in pressure and water flow analogy 12. Voltage as electric potential difference 13. Definition and unit of voltage (Volt = 1 Joule/Coulomb) 14. Voltage and current in a lightning flash 15. Electric resistance – definition and behavior 16. Ohm’s Law and relationship between resistance and current 17. Formula for resistance (R = V/I) 18. Conductors vs Insulators – Copper, Aluminum vs Rubber 19. SI unit of resistance – Ohm (Ω) 20. Factors affecting resistance of a wire 21. Resistors – function and material 22. What is electric power and how is it calculated (P = IV) 23. SI unit of power – Watt 24. Example: Power consumed by a 5V, 1.6A battery 25. Power ratings of common devices (Hair Dryer = 2000W, LED = 12W) 26. Why are fuses used in circuits? 27. Fuse mechanism – Low melting point material 28. Advantages of circuit breakers over fuses 29. Working of circuit breakers – automatic disconnection 30. Purpose of Earth wire – zero potential, safety from shock 31. Earthing in 3-pin plugs – Earth pin connection 32. Safety mechanism during fault currents – fuse breaks the circuit General Science General Science Class 8th General Science Class eight / eighth General Science MCQs ETEA PST CT SST PET DM AT TT Qari General Science MCQs ETEA education cadres jobs General Science MCQs ETEA tests preparation General Science Class 8th MCQs Part 4 General Science Class 8th All MCQs General Science Class 8th Important MCQs General Science Class 4th to Class 8th General Science PST MCQs General Science CT MCQs General Science PET MCQs General Science DM MCQs General Science Important Topics ETEA General Science Important Topics MCQs General Science Class 4th General Science Class 5th General Science Class 6th General Science Class 7th General Science Class 8th Class 8th Treasure of Knowledge MCQs 8th General Science General Science Treasure of Knowledge Treasure of Knowledge MCQs for ETEA Khyber Pakhtunkhwa Textbooks MCQs Khyber Pakhtunkhwa Text Board Books General Science MCQs ✅ Each concept is explained clearly with real-life examples and Urdu translations to help students understand better and retain more. 📌 Recommended For: 8th Class Students ETEA Science Prep PST, CT, PET, DM Test Aspirants General Science Revision General Science Class 8 Part 13, Electricity class 8 Urdu, Electric current, Voltage, Resistance, Ohm’s Law, Circuit breaker, Fuse, Power formula, ETEA science preparation, PST science questions, CT PET DM syllabus, power rating of appliances, Earth wire function, Three-pin plug, Current and voltage relationship, Science test MCQs #GeneralScience #Class8Science #Electricity #ElectricCurrent #Voltage #Resistance #ScienceInUrdu #ETEA #PSTTest #CTPETDM #SciencePreparation #OhmsLaw #CircuitBreaker #Fuse #PowerFormula #UrduExplanation #EducationalVideo #KnowledgePills
