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

The potential difference across the depletion region of germanium is.

Question # 2

The p-n junction in which p side is connected to+ive and n-side is -ve the junction is said to be:

Question # 3

Which component of the transistor has greater contrition of impurity.

Question # 4

Transistor was discovered by

Question # 5

The term invertor is used for.

Question # 6

Which diode works at reverse biasing.

Question # 7

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

Question # 8

A.C. can be converted into D.C. by

Question # 9

In photovoltaic cell, current is directly proportional to.

Question # 10

Reverse current flows due to

Question # 11

For normal use:

Question # 12

An expression for gain of an inverting amplifier is

Question # 13

Greater concentration of impurity is added in.

Question # 14

In a transistor, collector current is controlled by:

Question # 15

A device which converts low voltage or current to high voltage or current is called.

Question # 16

The colour of light emitted by a LED depends on.

Question # 17

The output from a full wave rectifier is

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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 The input resistance of an op amplifier is.
A. Low
B. High
C. Zero
D. Equal to output resistance
2 LDR becomes necessary when op amp is used as a
A. Night switch
B. Inverter
C. Comparator
D. Rectifier
3 One use of a single p-n junction semiconductor in an electrical circuit is a
A. Rectifier
B. Transistor
C. Battery
D. Diode
4 The reverse saturation current in a PN junction diode is only due to:
A. Majority carriers
B. Minoritycarriers
C. Acceptor ions
D. Donor ions
5 In a certain circuit, IB = 40 µA, IC = 20 mA
A. 450 amp
B. 0.45 amp
C. 5 m amp
D. 500 amp
6 The semi conductor diode has the property of
A. Two way conduction
B. Zero conduction
C. One way conduction
D. Amplification
7 The gate, which changes the logic level to its opposite level is called
A. NOR gate
B. AND gate
C. OR gate
D. NOT gate
8 In an N-type silicon, which of the following statement is true?
A. Electrons are majority carriers & trivalent atoms are the dopants
B. Electrons are majority carriers & pentavalent atoms are the dopants
C. Holes are minority carriers & pentavalent atoms are the dopants.
D. Holes are minority carriers & trivavalent atoms are the dopants.
9 The potential barrier for silicon is.
A. 0.7 V
B. 0.5 V
C. 0.3 V
D. 0.9 V
10 In a transistor, collector current is controlled by:
A. Collector voltage
B. Base current
C. Collector resistance
D. All of the above

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