Arasan Ganesan Polytechnic College, Sivakasi Department of

Arasan Ganesan Polytechnic College, Sivakasi
Department of Electrical & Electronics Engineering
IE Students’ Chapter
Monthly Technical Quiz – January 2015
[Note : Mail your answers to [email protected] on or before 31.01.2015]
---------------------------------------------------------------------------------------------------------------1. Hall effect is associated with
(A) Conductors.
(B) Semiconductors.
(D) Solders.
(C) Thermistors.
2. Addition of trivalent impurity to a semiconductor creates many
(A) holes.
(B) free electrons.
(C) valance electrons.
(D) bound electrons.
3. Magnetic materials
(A) provide path to magnetic flux. (B) are good insulators.
(C) are semiconductors.
(D) None.
4. In a ferromagnetic material the state of flux density is as follows when external
magnetic field is applied to it.
(B) Decreased
(A) Increased
(C) Remains unchanged
(D) Becomes zero
5. Paper is hygroscopic and absorbent.
(B) False
(A) True
6. Insulators have
(A) A full valence band.
(C) A large energy gap.
(B) An empty conduction band.
(D) All the above.
7. Hysteresis loss least depends on
(A) Frequency.
(B) Magnetic field intensity.
(C) Volume of the material.
(D) Grain orientation of material.
8. Atoms with four valence electrons are good conductors.
(A) True
(B) False
9. Semi-conductors have ________ temperature coefficient of resistance.
(A) Negative
(B) Positive
(C) Both positive and negative
(D) None of the above
10.Tick off the material, which is different from the group
(A) Constantan.
(B) Manganin.
(C) Nichrome.
(D) Brass.
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