Which of the following below is not taking place inside a silicon crystal?
Asome free electrons and holes are being created by thermal energy
Bother free electrons and holes are recombining
Csome free electrons and holes exist in an in-between state
Dsome free electrons disappears in the lattice due to vaporization
#342
Which of the following has the highest permeability?
Asoft iron
Bsteel
Cair
Dpermalloy
#343
Which of the following is a paramagnetic material?
Acarbon
Bbismuth
Ccopper
Doxygen
#344
Which of the following is the heaviest?
Aelectron
Bdeuterium
Cprotium
Dtritium
#345
Which of the following is used by permanent magnets as the magnetic material?
Airon
Bnickel
Csoft steel
Dhardened steel
#346
Which of the following items is not a type of material?
Aconductor
Bsemiconductor
Cinsulator
Ddiode
#347
Which of the following materials has permeability slightly less than that of free space?
Aparamagnetic
Bnon-magnetic
Cferromagnetic
Ddiamagnetic
#348
Who demonstrated that there are magnetic effects around every current-carrying conductor and that current-carrying conductors can attract and repel each other just like magnets?
ALuigi Galvani
BHans Christian Oersted
CCharles Coulomb
DAndre Ampere
#349
Why is it that the magnitude of magnetomotive force required for air gap is much greater than that required for iron part of magnetic circuit?
Abecause air is a gas
Bbecause air has the highest relative permeability
