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.Management Sciences
Category: Physics Of Solids
What is the SI unit of modulus of elasticity of substance ?
0
A. Nm-2
B. Jm-2
C. Nm-1
D. Being a number it has no unit.
If the density of atoms remain same along any direction in a crystal is called__________________?
A. Symmetry
B. Homogeneity
C. Isotropy
D. Cleavage
The net charge on n-type material is____________________?
A. Positive
B. Negative
C. Both positive and negative
D. Neutral
Which one of the following physical quantities does not have the dimensions of force per unit area ?
A. Stress
B. Strain
C. Youngs modulus
D. Pressure
Coercive force is the force which opposes ____________________?
A. Demagnetization
B. Breakage
C. Extension
D. Surface cracking
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
The energy band occupied by the valence electrons is called___________________?
A. Energy state
B. Valence band
C. ve energy state
D. conduction band
Which of the following substances posses the highest elasticity ?
A. Rubber
B. Steel
C. Glass
D. Copper
Materials that undergo plastic deformation before breaking are called __________________?
A. Brittle
B. Ductile
C. Amorphous
D. Polymers
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