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Online Tests
Ics Part 2 Physics Chapter 7 Test Online MCQs With Answers
Question # 1
A.C. can be converted into D.C. by
Choose an answer
An oscillator
Detector
An amplifier
Rectifier
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Question # 2
Photo diode detects.
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Visible light
Radio waves
X rays
All of them
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Question # 3
One use of a single p-n junction semiconductor in an electrical circuit is a
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Rectifier
Transistor
Battery
Diode
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Question # 4
When a PN-Junction is reverse biased the depletion region is.
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Widened
Narrowed
Normal
None of these
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Question # 5
The average gap for Germanium at 0K is
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1.12 ev
0.02 ev
6.72 ev
7.2 ev
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Question # 6
For automatic Switching of streetlight, the op amplifier is used as.
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Inductor
Converter
Comparator
Thermistor
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Question # 7
The colour of light emitted by a LED depends on.
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It forward biased
Its reverse biased
Unbiased
None of these
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Question # 8
_______ is the building block of every electronic circuit.
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Semi conductor diode
Resistor
Capacitor
Amplifier
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Question # 9
The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.
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Ohms
Kilo Ohms
Mega Ohms
Thounds Ohms
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Question # 10
When transistor are used in digital circuits they usually operate in the :
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Active region
Break down region
Saturation & cutoff regions
Linear region
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Question # 11
The P.D develop in case of germanium is:
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0.3
0.7
0.5
0.9
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Question # 12
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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Question # 13
The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:
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Neutral
Forward biased
Reversed biased
None of above
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Question # 14
In case of op-amp as an inverting amplifier, V
+
- V
-
= 0, this is because
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Open gain loop is very low
Closed loop gain is very high
Open loop gain is very high
Both (a) and (a)
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Question # 15
During negative half cycle of A.c then p-n junction offers.
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High resistance
Low resistance
No resistance
All of these
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Question # 16
The output of two input is zero only when its.
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Both inputs are zero
Either input is zero
Both inputs are one
Either input is one
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Question # 17
The ratio of potential barriers of Ge to Si at room temperatrue is.
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7:3
1:3
2:5
3:7
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Question # 18
Pulsating output of full wave rectifier can be made smooth by using circuit called.
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Filter
Amplifier
Resistor
Transistor
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