Question

Wire bound resistors are made by

• A. Winding the wire of an alloy of Ge, Au,Ga
• B. Winding the wire of an alloy of Cu, Al, Ag
• C. Winding the wire of an alloy of Manganin, Constantan,Nichrome
• D. Winding the wire of an alloy ofSi, Tu, Fe

Answer 1

The Correct Option is C

Wire-bound resistors are typically made by winding the wire of an alloy of Manganin, Constantan, and Nichrome. 

Manganin is an alloy composed of copper, manganese, and nickel. It has a low temperature coefficient of resistance, meaning its resistance changes very little with temperature variations. Manganin is often used for precision resistors due to its stability in varying temperature conditions.

Constantan is another copper-based alloy made of copper and nickel. It has a relatively high resistivity and is commonly used in resistors because of its stable resistance over a wide temperature range.

Nichrome is a nickel-chromium alloy that is known for its high electrical resistivity. It is often used in heating elements and resistors where high-temperature applications are required due to its ability to withstand elevated temperatures.

Therefore, the correct answer is: (D) wire-bound resistors are made by winding the wire of an alloy of Manganin, Constantan, and Nichrome.