What alloy composition is used for making variable resistors or rheostats?
Understand the Problem
The question is asking for the specific alloy composition used in the manufacturing of variable resistors or rheostats, presenting multiple-choice options to select from.
Answer
Nichrome or wire-wound resistance elements are used, such as Constantan or manganin.
The final answer is nichrome or wire-wound resistance elements like Constantan and manganin.
Answer for screen readers
The final answer is nichrome or wire-wound resistance elements like Constantan and manganin.
More Information
Rheostats use high resistivity materials to provide adjustable resistance in electric circuits. They often incorporate nichrome wire or copper-nickel alloys due to their reliable performance and stability across various temperatures.
Tips
Avoid confusing the materials used in fixed resistors with those used in variable resistors like rheostats.
Sources
- Guide to Rheostats - ohmite.com
- Rheostat: Definition, Symbol, Construction, Types & Applications - byjus.com
- Rheostat Wire Material - byjus.com
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