Second Year Physics Chapter 18 Online MCQ Test for 2nd Year Physics Chapter 18 Electronics Preparation

FSC Part 2 Physics
Chapter 18 Test

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Physics FSC Part 2 Chapter 18 Online MCQ's Test

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Question # 1

Most of the electrons in the base of an NPN transistor flow:

Question # 2

Photo diode is used for detection of.

Question # 3

For automatic Switching of streetlight, the op amplifier is used as.

Question # 4

A diode characteristic curve is a plot between

Question # 5

In case of reverse biasing, current is flown due to:

Question # 6

The symbol of p-n-p transistor is

Question # 7

The resistance between the inverting (-) and non inverting inputs is called Input resistance and is the order of.

Question # 8

One use of a single p-n junction semiconductor in an electrical circuit is a

Question # 9

Minimum number of semi conductor diodes required for full wave rectification are.

Question # 10

X=A+B is the mathematical notation for.

Question # 11

Transistors are made from

Question # 12

A transistor has parts:

Question # 13

The gate, which changes the logic level to its opposite level is called

Question # 14

Base of transistor is of order:

Question # 15

The device which is used as amplifier and works with the negative feedback is.

Question # 16

The P.D develop in case of silicon is:

Question # 17

Light emitting diodes are made from semiconductors.

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FSC Part 2 Physics Chapter 18 Online Test MCQ's

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Doping is made comparatively larger in
A. Emitter
B. Base
C. Collector
D. P -type semi conductor
2 A photo diode can turn its current ON and OFF in
A. Micro seconds
B. Mega seconds
C. Nano seconds
D. Mili seconds
3 Conversation of only one half of A.C. into D.C. is called.
A. Half wave amplification
B. Wave amplification
C. Half wave electrification
D. Half wave rectification
4 In case of op-amp as an inverting amplifier, V+ - V- = 0, this is because
A. Open gain loop is very low
B. Closed loop gain is very high
C. Open loop gain is very high
D. Both (a) and (a)
5 The ratio of potential barriers of Ge to Si at room temperatrue is.
A. 7:3
B. 1:3
C. 2:5
D. 3:7
6 Reverse current flows due to
A. Majority charge carriers
B. Minority charge carriers
C. Electrons
D. Holes
7 X=A+B is the mathematical notation for.
A. OR gate
B. NOR gate
C. NAND gate
D. AND gate
8 The device which is used as amplifier and works with the negative feedback is.
A. Operational amplifier
B. P-n-p transistor
C. n-p-n transistor
D. Transistor
9 Truth table of logic function.
A. Summarize its output values only
B. Tabulates all its input conditions only
C. Display all its input and output possibility
D. Is not base on logic algebra
10 For automatic Switching of streetlight, the op amplifier is used as.
A. Inductor
B. Converter
C. Comparator
D. Thermistor

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