Holes can exist in:
A. Conductors
B. Insulators
C. Semi conductors
D. All of the above
Many of the semi conductors are crystals of the type:
A. Face centred cubic
B. Body centred cubic
C. Simple cubic
D. All of the above
The electrons in conduction band are free to:
A. Transport vibrations
B. Transport signals
C. Transport charge
D. Transport impulses
A vacant or partially filled band is called:
A. Conduction band
B. Valence band
C. Forbidden band
D. Empty band
In simple cube one atom or molecule lies at its:
A. Force corners
B. Nine corners
C. Eight corners
D. Six corners
The breaking of crystals along definite direction is called:
A. Cleavage
B. Symmetry
C. Isotropy
D. Homogeneity
Coercive force is the force which opposes:
A. Demagnetization
B. Breakage
C. Extension
D. Surface cracking
n instrument which can measure potential without drawing any current is:
AA. voltmeter
B. galvanometer
C. cathode ray oscilloscope (CRO)
D. ammeter
The standard vector symbol for flux density is:
A. M
B. L
C. H
D. B
SI unit of flux density is:
A. NA-1m-1
B. NAm-1
C. NmA-1
D. NmA-2
