2nd Year Physics Chapter 18 Online MCQ Test for 12th Class Physics Chapter 18 (Electronics)

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Chapter 18 Test

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Physics ICS Part 2 Chapter 18 Online MCQ's Test

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Question # 1

Transistor was invented by:

Question # 2

The P.D develop in case of silicon is:

Question # 3

A diode characteristic curve is a plot between

Question # 4

Which one has greater cone of impurity among all:

Question # 5

A diode characteristics curve is a plot between

Question # 6

In a transistor, collector current is controlled by:

Question # 7

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

Question # 8

Photo diode detects.

Question # 9

The potential difference across the depletion region of germanium is.

Question # 10

The potential barrier for silicon is.

Question # 11

For normal transistor the emitter current can be given by

Question # 12

Which factor does not affect the conductivity of PN-Junction diode.

Question # 13

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

Question # 14

In an N-type silicon, which of the following statement is true?

Question # 15

NAND gate represented by:

Question # 16

The reverse saturation current in a PN junction diode is only due to:

Question # 17

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

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FSc Part II Physics Chapter 0 Important MCQ's

Sr.# Question Answer
1 Transistor was invented by:
A. Bardeen
B. Micheal faraday
C. Lenz
D. Newton
2 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)
3 The P.D develop in case of germanium is:
A. 0.3
B. 0.7
C. 0.5
D. 0.9
4 The circuit of full wave rectification consist of
A. Three diodes
B. Four diodes
C. Two diodes
D. One diode
5 Which component of the transistor has greater contrition of impurity.
A. Base
B. Emitter
C. Collector
D. Emitter and collector
6 A.C. can be converted into D.C. by
A. An oscillator
B. Detector
C. An amplifier
D. Rectifier
7 Photodiode is used for:
A. Detection of current
B. Detection of heat
C. Detection of light
D. Both a & b
8 LDR becomes necessary when op amp is used as a
A. Night switch
B. Inverter
C. Comparator
D. Rectifier
9 The average gap for Germanium at 0K is
A. 1.12 ev
B. 0.02 ev
C. 6.72 ev
D. 7.2 ev
10 Output resistance of an op amp is
A. High
B. Low
C. Zero
D. Equal to input resistance

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