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Chapter 17 - Physics of Solids - 2
1.
The addition of impurity to an intrinsic semi conductor is called______________.
a) Not equal
b) Doping
c) Perfect
2.
In N-type material majority carriers are___________.
a) Electron
b) Neutron
c) Proton
3.
When a conductor offers no resistance to electric current then it is called____________.
a) Semi conductor
b) Simple conductor
c) Super conductor
4.
In magnetic resonance imaging ____________ are used.
a) Semi conductor
b) Super conductor
c) Simple conductor
5.
Curie temp for iron is _____________.
a) 50 degrees C
b) 750 degrees C
c) 75 degrees C
6.
Each domain of a substance acts like a_____________.
a) Diamagnetic
b) Conductor
c) Resister
d) Magnet
7.
A substance in which the orbital and spin axis of electron are so oriented that their magnetic fields support each other is called____________.
a) Diamagnetic
b) Magnet
c) Paramagnet
d) Ferromagnetic
8.
A substance in which the magnetic field reduces to zero by spin and orbital motion of electron is called____________.
a) Ferromagnetic
b) Super conductor
c) Diamagnetic
d) Magnet
9.
A substance in which atoms to co-operate with each other in such a way to exhibit a strong magnetic effect is called_____________.
a) Ferromagnetic
b) Paramagnet
c) Diamagnetic
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