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Free tnpsc model questions Online Test - MeritNotes
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No. of Questions :10
Remaining Time :
1. A TRUTH TABE represents all possible
(a)
inputs of a logic circuit
(b)
symbols of a logic circuit
(c)
outputs of a logic circuit
(d)
inputs and outputs of a logic circuit
2. Dopants are
(a)
liquid atoms
(b)
gaseous atoms
(c)
pure atoms
(d)
impurity atoms
3. Kirchoff's current law
(a)
is true for all transistor type and transistor configuration
(b)
is true for all transistor type only
(c)
is true for all transistor configuration only
(d)
satisfies none of the above
4. Before the Second World War _____ were used in the process of electrical signal generation, amplification and transmission.
(a)
semiconducting materials
(b)
integrated circuits
(c)
vacuum tubes
(d)
transistors
5. The colour of light emitted by a LED depends on
(a)
its reverse bias
(b)
its forward bias
(c)
type of semiconductor material
(d)
the amount of forward current
6. On the left side of the PN junction
(a)
the acceptor atoms become positive ions
(b)
the donor atoms become negative ions
(c)
the donor atoms become positive ions
(d)
the acceptor atoms become negative ions
7. The frequency maintaining device of the sinusoidal oscillator is
(a)
a transistor oscillator
(b)
zener diode
(c)
a transistor amplifier
(d)
none of the above
8. Multimeter measures
(a)
resistance
(b)
current
(c)
voltage
(d)
all the above
9. The colour of the light emitted by the LED will depend upon
(a)
the temperature at which it is operated
(b)
the voltage at which it is operated
(c)
the type of the semiconducting material used
(d)
none of the above
10. On the right side of the PN junction
(a)
the donor atoms become positive ions
(b)
the donor atoms become negative ions
(c)
the acceptor atoms become negative ions
(d)
the acceptor atoms become positive ions
