Top 50 Electrical Engineering Questions & Answers

----------------------------------------------------------- 01: What is the difference between earth and neutral? Answer: Neutral is a return current path for equipment and earthing is protection for humans and Earth is a support for neutral. If neutral is not present, the machine we are using will get in full phase and we will get a shock. So earthing is done to avoid such shocks. 02: What is the difference between an Insulator and a Dielectric? Answer: Dielectrics are used to store the electric charges, while insulators are used to block the flow of electric charges. All dielectrics are insulators (they dont allow the flow of electric charges through them) but all insulators arent dielectric because they cant store charges unlike dielectrics. 03: What are the disadvantages of low power factor? Answer: The disadvantages are: Large KVA rating of equipment, Greater conductor size, large copper losses, Poor voltage regulation and Reduced handling capacity of the system 04: Why is earth pin longest and thickest? Answer: More the thickness of the wire/conductor less is the resistance. A thick earth pin provides a less resistant path for the current to be grounded, This is for safety so that the leakage current if any will take the