MCQ
The substances having very short plastic region are
- ADuctile
- ✓Brittle
- CMalleable
- DAll of these
Substances with short plastic region are brittle because less amount of permanent deformation could be done in them.
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[Use: Bohr radius, $\mathrm{a}=52.9 \mathrm{pm}$ Rydberg constant, $R_H=2.2 \times 10^{-18} \mathrm{~J}$ Planck's constant, $\mathrm{h}=6.6 \times 10^{-34} \mathrm{~J} \mathrm{~s}$ Speed of light, $c=3 \times 10^8 \mathrm{~m} \mathrm{~s}^{-1}$ ]

