If the density of atoms remain same along any direction in a crystal is called:
A. Symmetry
B. Homogeneity
C. Isotropy
D. Cleavage
The angular position of cells remains the same for a sample of a crystal. This property is called:
A. Isotropy
B. Cleavage
C. Homogeneity
D. The external symmetry of form
A ferromagnet will become fully magnetized at:
A. High voltage A.C
B. Low voltage A.C
C. Alternating current at its peak value
D. D.C current at peak value
The energy band occupied by the valence electrons is called:
A. Energy state
B. Valence band
C. ve energy state
D. conduction band
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
Materials that undergo plastic deformation before breaking are called:
A. Brittle
B. Ductile
C. Amorphous
D. Polymers
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.
Very weak magnetic fields are detected by:
A. Squids
B. Magnetic resonance imaging (MRI)
C. Magnetometer
D. Oscilloscope
The net charge on n-type material is:
A. Positive
B. Negative
C. Both positive and negative
D. Neutral
In a semiconductors the charge carriers are:
A. Holes only
B. Electrons only
C. Electron and holes both
D. All of the above
