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Online Tests
Physics Fsc Part 2 Chapter 7 Online Test MCQs With Answers
Question # 1
The use of LDR is in the circuit of.
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Logic gate
Rectifier
Oscillator
High Switch
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Question # 2
Transistor was invented by:
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Bardeen
Micheal faraday
Lenz
Newton
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Question # 3
A two inputs NAND gat with inputs a and b has an output '0' if.
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B is zero
A is zero
Both A and B are 1
Both A and B are '0'
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Question # 4
Reverse current flows due to
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Majority charge carriers
Minority charge carriers
Electrons
Holes
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Question # 5
The input resistance of an op amplifier is.
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Low
High
Zero
Equal to output resistance
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Question # 6
In full wave rectification number of diodes required are equal to.
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2
3
4
5
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Question # 7
Improper bisting of a transistor circiut produces:
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Heavy loading of emitter current
Distortion in the output output signal
Excessive heat at collector terminal
Faculty location of load line
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Question # 8
LDR becomes necessary when op amp is used as a
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Night switch
Inverter
Comparator
Rectifier
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Question # 9
A light emitting diode emits light only when
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Reverse biased
Forward biased
Unbiased
None of these
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Question # 10
NAND gate represented by:
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X = A. B
X = A+B
X= A.B
X=|A+B|
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Question # 11
Which device is used as a rectifier?
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Capacitor
Transistor
Diode
Transformer
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Question # 12
Which is not fundamental logic gate.
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NOT
AND
OR
NAND
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Question # 13
The sensor of light is.
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Transistor
LED
Diode
Light dependent resistance
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Question # 14
The gate, which changes the logic level to its opposite level is called
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NOR gate
AND gate
OR gate
NOT gate
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Question # 15
Base of transistor is of order:
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10
-11
m
10
6
m
10
-8
m
10
-6
m
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Question # 16
Which factor does not affect the conductivity of PN-Junction diode.
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Doping
Temperature
Voltage
Pressure
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Question # 17
Greater concentration of impurity is added in.
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Base
Emitter
Collector
LED
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Question # 18
The gain of transistor amplifier depends upon
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Resistance connected with collector
Resistance connected with base voltage
Input voltage
Output voltage
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