Table of Contents
- 1 What materials are used to make a resistor?
- 2 How do you make a resistor?
- 3 What is metal film resistor?
- 4 What semiconductor material is generally used in the production of resistors?
- 5 What are fixed resistors made of?
- 6 What metal is used in resistors?
- 7 What kind of material is used for resistive wire?
- 8 What are the different types of resistors used in medical devices?
What materials are used to make a resistor?
The resistive element is made from a mixture of finely powdered carbon and an insulating material, usually ceramic. A resin holds the mixture together. The resistance is determined by the ratio of the fill material (the powdered ceramic) to the carbon.
How do you make a resistor?
To create a wirewound resistor, one piece of wire would have to serve as the path for the electrical current to flow from one end of the resistor to the other. To create a resistor with a small resistance (or Ohm) value, use a thicker, shorter wire as the path between the two electrical leads.
What type of powder are used for making resistors?
The resistive elements in these resistors are made from a mixture of finely ground carbon dust or graphite and a non-conducting ceramic powder (like clay) to bind it all together.
What are the basic materials in most fixed resistors?
Usually a nichrome wire or a manganin wire is used to wind the core because they offer high resistance. Whereas plastic, ceramic or glass is used for core. Wire wound resistors are very accurate.
What is metal film resistor?
Metal film resistors have a thin metal layer as resistive element on a non-conducting body. They are among the most common types of axial resistors. The appearance of metal film resistors is similar to carbon film resistors, but their properties for stability, accuracy, and reliability are considerably better.
What semiconductor material is generally used in the production of resistors?
Varistor Resistors: These types of resistors are made of semiconductor materials like silicon and ceramic metal-oxides. The resistance value of these resistors varies along with the applied voltage of a circuit.
Which metal is used in resistance?
Types
| Material | Resistivity (ohm-cmil/ft) | Resistivity (10−6 ohm-cm) |
|---|---|---|
| Platinum | 63.16 | 10.5 |
| Stainless steel (304) | 541 | 90 |
| Steel (0.5% carbon) | 100 | 16.62 |
| Zinc | 35.49 | 5.90 |
What is resistor wire made of?
The wire material has a high resistivity, and is usually made of an alloy such as nickel-chromium (Nichrome) or a copper-nickel-manganese alloy called Manganin. Common core materials include ceramic, plastic, and glass. Wirewound resistors are the oldest type of resistors that are still manufactured today.
What are fixed resistors made of?
All modern fixed value resistors can be classified into four broad groups: Carbon Composition Resistor – Made of carbon dust or graphite paste, low wattage values. Film or Cermet Resistor – Made from conductive metal oxide paste, very low wattage values.
What metal is used in resistors?
Metal film resistors are usually made of Nichrome, but also other materials such as tantalum nitride is used. The resistive film is printed on a cylindrical or flat insulating substrate.
Which is the best material for a resistor?
Resistor materials 1 Wirewound (WW) 2 Carbon Composition (CCR) 3 Carbon Film 4 Metal Film 5 Metal Oxide Film 6 Foil 7 Key Performance Indicators
How are wire would resistors and film film resistors made?
Wire-would resistors are constructed by winding a resistive wire around an insulated form and covering the end product with an insulating material. Film – Film resistors are made by forming a thin layer of resistive material onto an insulated form.
What kind of material is used for resistive wire?
The resistive wire is usually a nickel-chromium alloy, and the core is often ceramic or fiberglass. A coating such as vitreous enamel is used for protection. The spiral winding has capacitive and inductive effects that makes it not suitable for applications higher than 50 kHz.
What are the different types of resistors used in medical devices?
Schematic symbols for fixed and variable resistors are as follows: Commercially available resistors commonly used in medical devices can be further sub-divided into three basic types according to construction technology; composition, wire-would and film. These basic resistor technologies differ in size, cost and electrical characteristics.