Basic Electronics -Resistor Types

Hi Today we are discussing about resistors and their types We can classify resistors into two different categories Fixed resistors and Variable resistors Fixed resistor means its value is fixed That means its value can't be changed It will be a fixed value That is called resistance value Variable resistor means its value can vary Now let's see what are these two categories Fixed resistors We can classify fixed resistors mainly into four different categories First one is wire wound resistor Carbon composition resistor Carbon film resistor Metal film resistor We can classify fixed resistors as Wire wound, carbon composition, carbon film and metal film resistors Now let's see each one in detail First let's see wire wound resistor It consists of a former made up of an insulating material such as ceramic or plastic There is a former in the wire wound resistor This former is made up of ceramic or plastic The shape of the former is cylindrical or rectangular On top of the insulating former, we wound a resistance wire The resistance wire used is a necrom wire The necrom wire of the required length is wound on top of the former The reason for using this material is It has higher thermal stability and tensile strength That is why we select necrom wire for this material We cover this material with an insulating material The insulating material we use is nylon fiberglass etc. External terminals are made up of copper The wire wound resistor consists of a former The former is made up of an insulating material such as ceramic or plastic The shape of the former is cylindrical or rectangular On top of the insulating former, we wound a resistance wire The wire wound resistor consists of a necrom wire It has higher thermal stability and tensile strength We cover this material with an insulating material The wire wound resistor consists of a necrom wire It has high thermal stability and tensile strength The shape of the material we use is necrom wire The wire wound resistor consists of a necrom wire It has higher thermal stability and tensile strength 2. Can be used in high temperature situation 3. Capable of carrying extremely large current 4. Can withstand mechanical shock and vibration 5. Can be used in high voltage circuits 6. Not suitable for high frequency operation. Very large in size and weight. Costly 7. Not suitable for high frequency operation. Very large in size and weight. Costly 8. Carbon resistive material is deposited on a glass tube attached to terminal leads by a conductive cement 9. Thick organic resin is molded around the assembly 10. Resistance values can be adjusted by adjusting the carbon composition of the binder 1. Advantages of Carbon Composition Resistor 1. Disadvantages of Carbon Composition Resistor 2. Resistance values vary with aging 3. Get easily heated and crack down on soldering 4. Carbon Film Resistor 5. A thin film of carbon is deposited on a substrate 6. Vacuum Sputtering 7. A thin film of carbon is deposited on a substrate 8. Vacuum Sputtering 9. Vacuum Sputtering 10. Vacuum Sputtering 11. Advantages of Carbon Composition Resistor 1. Resistance values vary with aging 2. Resistance values vary with aging 3. Resistance values vary with aging 4. A thin film of carbon is deposited on a substrate 5. A thin film of carbon is deposited on a substrate 6. Can replace wire wound resistor in high voltage application 7. Can replace wire wound resistor in high voltage application 8. Disadvantages of Carbon Composition Resistor 9. Cannot withstand high temperature 10. Chemically reactive and hence unstable 11. Higher Inherent Inductance 12. Higher Inherent Inductance 13. Disadvantages of Carbon Composition Resistor 14. Disadvantages of Carbon Composition Resistor 15. Cannot withstand high temperature 16. Chemically reactive and hence unstable 17. Higher Inherent Inductance 18. Cannot withstand high temperature 19. Higher Inherent Inductance 20. Disadvantages of Carbon Composition Resistor 21. Trimmer Potentiometer 22. Trimmer Potentiometer 23. Trimmer Potentiometer 24. Trimmer Potentiometer 25. Trimmer Potentiometer 26. Trimmer Potentiometer 27. Trimmer Potentiometer 28. Trimmer Potentiometer 29. Trimmer Potentiometer 30. Trimmer Potentiometer 31. Trimmer Potentiometer 32. Trimmer Potentiometer 33. Trimmer Potentiometer 34. Trimmer Potentiometer 35. Trimmer Potentiometer 36. Trimmer Potentiometer 37. Trimmer Potentiometer 38. Trimmer Potentiometer 39. Trimmer Potentiometer 40. Trimmer Potentiometer 41. Trimmer Potentiometer 42. Trimmer Potentiometer 43. Trimmer Potentiometer 44. Trimmer Potentiometer 45. Trimmer Potentiometer 46. Trimmer Potentiometer 47. Trimmer Potentiometer 48. Trimmer Potentiometer 49. Trimmer Potentiometer 50. Trimmer Potentiometer 51. Trimmer Potentiometer 52. Trimmer Potentiometer 53. Trimmer Potentiometer 54. Trimmer Potentiometer 55. Trimmer Potentiometer 56. Trimmer Potentiometer 57. Trimmer Potentiometer 58. Trimmer Potentiometer