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Free tnpsc model questions Online Test - MeritNotes
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Online Exam
No. of Questions :10
Remaining Time :
1. The electrons in the atom of an element which determine its chemical and electrical properties are called
(a)
active electrons
(b)
excess electrons
(c)
revolving electrons
(d)
valence electrons
2. _____ are used as regulators.
(a)
Zener diodes
(b)
Voltage stabilizer
(c)
LED's
(d)
LCD's
3. The device which converts alternating current into direct current is called
(a)
alternator
(b)
converter
(c)
transformer
(d)
rectifier
4. _____ is a forward biased PN junction diode which emits visible light when energized.
(a)
Zener diode
(b)
LCD
(c)
LED
(d)
None of the above
5. Zener diode is exclusively operated in the
(a)
active region
(b)
saturation region
(c)
breakdown region
(d)
cut in region
6. Forbidden energy gap is absent in
(a)
insulators
(b)
conductors
(c)
semiconductors
(d)
all the above
7. Electrons and holes can be generated in a semiconductor crystal with
(a)
heat energy or light energy
(b)
heat energy and light energy
(c)
light energy
(d)
heat energy
8. The resistivity of semiconductor
(a)
lies between conductors and insulators
(b)
is equal to zero
(c)
less than that of insulators
(d)
is greater than that of conductors
9. The central region of the output characteristic curve is called
(a)
active region
(b)
breakdown region
(c)
cutoff region
(d)
saturation region
10. ______ is applied to the operation of computer devices.
(a)
Modern algebra
(b)
Vector algebra
(c)
Boolean algebra
(d)
None of the above
