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प्रश्न
Differentiate between the following:
Invar and Alnico
अंतर स्पष्ट करें
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उत्तर
| Invar | Alnico |
|---|---|
| It is an alloy of iron and nickel. | It is an alloy mainly containing aluminium, nickel, cobalt and iron. |
| It has a very low coefficient of thermal expansion. | It has strong magnetic properties. |
| It is used for precision instruments, measuring tapes and pendulum rods. | It is used for making permanent magnets. |
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अध्याय 7: Metallurgy - EXERCISE [पृष्ठ १५८]
