Question

The common material used in wire-wound resistor is
1. Carbon
2. Manganin
3. Bronze
4. German silver wire

Answer 1

Correct Answer - Option 2 : Manganin

The common material used in the wire-wound resistor is Manganin.

Wire-wound resistors:

• The wire-wound resistor is made by winding the metal wire around a metal core.
• In wire wound resistors, the metal wire is used as the resistance element and metal core is used as the non-conductive material.
• A Nichrome or Manganin is commonly used as the metal wires because they provide high resistance to the electric current and operates at high temperature.
• The most commonly used core materials include plastic, fiberglass, or ceramic.
• It is used as a precision resistor in instrumentation because of its high accuracy.
• Wire-wound resistors have very high stability and power rating.
• These types of resistors are generally only available in very low ohmic high precision values (from 0.01 Ω to 100 kΩ) due to the gauge of the wire and number of turns possible on the former making them ideal for use in measuring circuits and Wheatstone bridge type applications.

Note:

• Carbon resistors are the most common type of composition resistors.
• Carbon resistors are a cheap general-purpose resistor used in electrical and electronic circuits.