In simple cube one atom or molecule lies at its
A. Force corners
B. Nine corners
C. Eight corners
D. Six corners
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Physics
The breaking of crystals along definite direction is called
A. Cleavage
B. Symmetry
C. Isotropy
D. Homogeneity
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The bulk properties of materials such as their mode of fracture can be related to their
A. Polymerization
B. Cleavage
C. Microstructure
D. Dislocation
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Coercive force is the force which opposes
A. Demagnetization
B. Breakage
C. Extension
D. Surface cracking
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The curie temperature is that at which
A. Semi-conductor becomes conductors
B. Ferromagnetic becomes paramagnetic
C. Paramagnetic becomes diamagnetic
D. Metals become super conductor
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A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is
A. (F1+F2) (121+122)
B. (F1+F2) (122-112)
C. (F1+F2) (12-11)
D. (F1+F2) (12-11)
Materials that undergo plastic deformation before breaking are called
A. Brittle
B. Ductile
C. Amorphous
D. Polymers
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A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber ?
A. 2×108 Nm-2
B. 5×106 Nm-2
C. 0.5×10-6 Nm-2
D. 0.2×10-6Nm-2
What is the SI unit of modulus of elasticity of substance ?
A. Nm-2
B. Jm-2
C. Nm-1
D. Being a number it has no unit.
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