Deck 4: Electronics and Transmission Line

Question 1

A Differential Amplifier should have collector resistor's value (RC1 & RC2) as

A)5k?, 5k?
B)5?, 10k?
C)5?, 5k?
D)5k?, 10k?

Answer 1

5k?, 5k?

Question 2

A Differential Amplifier amplifies

A)Input signal with higher voltage
B)Input voltage with smaller voltage
C)Sum of the input voltage
D)None of the Mentioned

Answer 2

None of the Mentioned

Question 3

The value of emitter resistance in Emitter Biased circuit are RE1=25k? & RE2=16k?. Find RE

A)9.756k?
B)41k?
C)9.723k?
D)10k?

Answer 3

9.756k?

Question 4

If output is measured between two collectors of transistors, then the Differential amplifier with two input signal is said to be configured as

A)Dual Input Balanced Output
B)Dual Input Unbalanced Output
C)Single Input Balanced Output
D)Dual Input Unbalanced Output.

Question 5

A differential amplifier is capable of amplifying

A)DC input signal only
B)AC input signal only
C)AC & DC input signal
D)None of the Mentioned

Question 6

In ideal Differential Amplifier, if same signal is given to both inputs, then output will be

A)Same as input
B)Double the input
C)Not equal to zero
D)Zero

Question 7

An emitter bias Dual Input Balanced Output differential amplifier has VCC=20v, ?=100, VBE=0.7v, RE=1.3k?. Find IE

A)7.42mA
B)9.8mA
C)10mA
D)8.6mA

Question 8

Find IC, given VCE=0.77v, VCC=10v, VBE=0.37v and RC=2.4k? in Dual Input Balanced Output differential amplifier

A)0.4mA
B)0.4A
C)4mA
D)4A

Question 9

For the circuit shown below, determine the Output voltage (Assume ?=5, differential input resistance=12 k?)

A)4.33v
B)2.33v
C)3.33v
D)1.33v

Question 10

In a Single Input Balanced Output Differential amplifier, given VCC=15v, RE = 3.9k?, VCE=2.4 v and re=250?. Determine Voltage gain

A)26
B)56
C)38
D)61

Question 11

The characteristic impedance of a quarter wave transformer with load and input impedances given by 30 and 75 respectively is

A)47.43
B)37.34
C)73.23
D)67.45

Question 12

For a matched line, the input impedance will be equal to

A)Load impedance
B)Characteristic impedance
C)Output impedance
D)Zero

Question 13

The reflection coefficient lies in the range of

A)0 < ? < 1
B)-1 < ? < 1
C)1 < ? < ?
D)0 < ? < ?

Question 14

When the ratio of load voltage to input voltage is 5, the ratio of the characteristic impedance to the input impedance is

A)1/5
B)5
C)10
D)25

Question 15

The power of the transmitter with a radiation resistance of 12 ohm and an antenna current of 3.5A is

A)147
B)741
C)174
D)471

Question 16

The group delay of the wave with phase constant of 62.5 units and frequency of 4.5 radian/sec is

A)13.88
B)31.88
C)88.13
D)88.31

Question 17

5 is" The maximum impedance of a transmission line 50 ohm and the standing wave ratio of

A)20
B)125
C)200
D)75

Question 18

The average power in an electromagnetic wave is given by

A)propagation constant
B)poynting vector
C)phase constant
D)attenuation constant

Question 19

The characteristic impedance of a transmission line is normally chosen to be

A)50
B)75
C)50 or 75
D)100

Question 20

Identify the material which is not present in a transmission line setup.

A)waveguides
B)cavity resonator
C)antenna
D)oscillator

Question 21

What is the Common Mode Rejection Ratio?

A)Output of a differential amplifier
B)Ability of an amplifier to reject common mode signals
C)Ability of an amplifier to accept common mode signals
D)None of the mentioned

Question 22

For an inverting amplifier positive terminal of input is connected to of 741 IC.

A)Pin number 3
B)Pin number 2
C)Pin number 1
D)Pin number 7

Question 23

In 741 IC, pin number 4 is represented by                      

A)Offset null
B)Positive input
C)Negative input
D)Negative supply