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

FSC Part 2 Physics
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Physics FSC Part 2 Chapter 18 Online MCQ's Test

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Question # 1

A two inputs NAND gat with inputs a and b has an output '0' if.

Question # 2

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

Question # 3

Doping is made comparatively larger in

Question # 4

Conversion of A.C into D.C is called:

Question # 5

Light emitting diodes are made from semiconductors.

Question # 6

The output from a full wave rectifier is

Question # 7

A light emitting diode emits light only when

Question # 8

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

Question # 9

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

Question # 10

Photodiode is used for:

Question # 11

Logic gate can control some physical parameters like.

Question # 12

the number of terminals in a semiconductor diode are

Question # 13

The ratio of potential barriers of Ge to Si at room temperatrue is.

Question # 14

Transistor was invented by:

Question # 15

The use of LDR is in the circuit of.

Question # 16

Base of transistor is of order:

Question # 17

The gain of transistor amplifier depends upon

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FSC Part 2 Physics Chapter 18 Online Test MCQ's

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Sr.# Question Answer
1 A light emitting diode emits light only when
A. Reverse biased
B. Forward biased
C. Unbiased
D. None of these
2 Transistor was invented by:
A. Bardeen
B. Micheal faraday
C. Lenz
D. Newton
3 Rectification is the process of converting.
A. D.C. into A.C.
B. A.C. in to D.C.
C. Low signal to high
D. High signal to low
4 Which device is used as a rectifier?
A. Capacitor
B. Transistor
C. Diode
D. Transformer
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 potential difference across depletion region in case of Si is
A. 0.6 volt
B. 0.9 volt
C. 0.7 volt
D. 0.2 volt
7 For normal transistor the emitter current can be given by
A. IE = IC
B. IE = IC + IB
C. IE = IB
D. None of these
8 Which is not fundamental logic gate.
A. NOT
B. AND
C. OR
D. NAND
9 The open loop gain of the amplifier is order of.
A. 106
B. 105
C. 107
D. 103
10 Output resistance of an op amp is
A. High
B. Low
C. Zero
D. Equal to input resistance
11 Automatic function of street light can be done by the use of.
A. Inductor
B. Rectifier
C. Comparator
D. emf
12 Photodiode is used for:
A. Detection of current
B. Detection of heat
C. Detection of light
D. Both a & b
13 The input resistance of an op amplifier is.
A. Low
B. High
C. Zero
D. Equal to output resistance
14 The potential barrier for silicon is.
A. 0.7 V
B. 0.5 V
C. 0.3 V
D. 0.9 V
15 The semi conductor diode has the property of
A. Two way conduction
B. Zero conduction
C. One way conduction
D. Amplification
16 For automatic Switching of streetlight, the op amplifier is used as.
A. Inductor
B. Converter
C. Comparator
D. Thermistor
17 Minimum number of semi conductor diodes required for full wave rectification are.
A. 1
B. 2
C. 3
D. 4

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