Electrical Basics and Study Material - Important Points

Rajeev Reddy Nareddula 12/20/2023

1. Electricity is the flow of electric charge.

2. An electric circuit is a closed path through which electric charge can flow.

3. A voltage (or potential difference) is the difference in electric potential between two points in an electric circuit.

4. Electric current is the rate at which electric charge flows through a conductor in an electric circuit.

5. Resistance is the opposition of a material to the flow of electric current.

6. Conductors are materials that allow electric current to flow easily, while insulators are materials that do not allow electric current to flow easily.

7. A circuit breaker is a safety device that automatically interrupts an electric circuit when a fault or overload occurs.

8. A fuse is a safety device that permanently interrupts an electric circuit when a fault or overload occurs.

9. An alternating current (AC) is an electric current that alternates direction periodically, while a direct current (DC) is an electric current that flows in one direction only.

10. Transformers are electrical devices that transfer electrical energy from one circuit to another by changing the voltage and current levels using electromagnetic induction.

11. Inductors are electrical devices that store electrical energy in a magnetic field and can oppose changes in electric current flowing through them.

12. Capacitors are electrical devices that store electrical energy in an electric field and can store electrical charge for a short period of time.

13. Switches are electrical devices that can open or close an electric circuit to control the flow of electric current.

14. Fuses and circuit breakers are used to protect electrical circuits and devices from damage caused by overloads, short circuits, and other faults.

15. Electrical safety precautions include using appropriate protective equipment, following safe working practices, and ensuring proper grounding and insulation of electrical circuits and devices to prevent electrical shocks and fires.