Manganin is an alloy containing:

Question

Question

This question was previously asked in

DSSSB PGT Chemistry (Female) Official Paper (Held On: 06 Jul, 2018 Shift 1)

Answer 1

CONCEPT:

Manganin Alloy Composition

Manganin is a type of resistance alloy used mainly for manufacturing standard resistors and for precise measurement instruments.
It is known for its low thermal coefficient of resistance, meaning its electrical resistance doesn't change significantly with temperature.
The alloy is primarily composed of copper (Cu), manganese (Mn), and nickel (Ni).
These elements provide the desired properties like stability, corrosion resistance, and low temperature coefficient.

EXPLANATION:

The given options describe various possible combinations of elements that could form an alloy.
Manganin is specifically composed of the following elements:
- Copper (Cu): Acts as the base metal providing conductivity.
- Manganese (Mn): Improves the stability and resistance properties of the alloy.
- Nickel (Ni): Enhances corrosion resistance and durability.
Other combinations like Zn, Co, Fe, etc., are incorrect as they do not represent the composition of Manganin.

Therefore, the correct answer is Option 1: Cu, Mn, Ni.