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# SSC Scientific Assistant Electronics Previous Year Questions 81 to 100 AMBIPi

Hi students, Welcome to Amans Maths Blogs (AMBIPi). Are you preparing for SSC Scientific Assistant and looking for SSC Scientific Assistant Electronics Questions 81 to 100 with Answer Keys? In this article, you will get previous year questions of SSC Scientific Assistant IMD (Indian Meteorological Department), which helps you in the preparation of government job of SSC IMD Scientific assistant.

## SSC Scientific Assistant IMD Previous Year Questions

SSC Scientific Assistant Electronics Question No: 81

What is the use of Schmitt trigger in PWM signal reception ?

Option A : For better synchronization

Option B : To produce ramp signal

Option C : To remove noise

Option D : To better selectivity

Option C : To remove noise

SSC Scientific Assistant Electronics Question No: 82

Choose the areas where the multiplexing is used ?

I Packet Switching

II Circuit Switching

III Data Switching

Option A : I only

Option B : II only

Option C : III only

Option D : I and II only

Option B : II only

SSC Scientific Assistant Electronics Question No: 83

Calculate the transmission rate  (in kbps) of TDM if the links transmits 2000 frames per second and each slot has 16 bits.

Option A : 8

Option B : 16

Option C : 32

Option D : 64

Option C : 32

SSC Scientific Assistant Electronics Question No: 84

Which of the following is a disadvantage of FDM ?

Option A : Complexity is a demodulation

Option B : Only one signal can be transmitted at a given time

Option C : Need of synchronization between transmitter and receiver

Option D : Cross talk occurs

Option D : Cross talk occurs

SSC Scientific Assistant Electronics Question Paper No: 85

What is the relation between the bandwidth of ASK Modulated signal and baseband signal ?

Option A : Modulated signal bandwidth is one-forth of the bandwidth of baseband signal

Option B : Modulated signal bandwidth is half of the bandwidth of baseband signal

Option C : Modulated signal bandwidth is equal to the bandwidth of baseband signal

Option D : Modulated signal bandwidth is double of the bandwidth of baseband signa

Option C : Modulated signal bandwidth is equal to the bandwidth of the baseband signal

SSC Scientific Assistant Electronics Previous Year Paper Question No: 86

Which of the following pair shares same probability of error ?

Option A : ASK and FSK

Option B : ASK and PSK

Option C : FSK and PSK

Option D : ASK AND QPSK

Option C : FSK and PSK

SSC Scientific Assistant Electronics Question No: 87

Which among the following is NOT a common usage area of fiber-optic cable ?

Option A : Computer network

Option B : Consumer TV

Option C : Closed circuit TV

Option D : Long distance telephone systems

Option B : Consumer TV

SSC Scientific Assistant Electronics Question Paper No: 88

Which of the following is principal of operation of fiber-optic cable ?

Option A : Absorption

Option B : Dispersion

Option C : Distortion

Option D : Reflection

Option D : Reflection

SSC Scientific Assistant Electronics Question Paper No: 89

Which material is preferred for making the core of a fibre -optical cable ?

Option A : Air

Option B : Diamond

Option C : Glass

Option D : Quatarz

Option C : Glass

SSC Scientific Assistant Electronics Previous Year Question: 90

What is the refractive index of the incident medium in a fibre-optic cable when the reflective index of reflective medium is 1.2 and critical angle is 30 degree ?

Option A : 0.6

Option B : 1

Option C : 1.5

Option D : 2.4

Option D : 2.4

SSC Scientific Assistant Electronics Question No: 91

Which modulation technique is mostly used in communication through satellites ?

Option A : AM

Option B : FM

Option C : PAM

Option D : FCM

Option B : FM

SSC Scientific Assistant Electronics Question No: 92

What is the minimum number of satellites needed for global communication ?

Option A : 3

Option B : 6

Option C : 7

Option D : 8

Option B : 6

SSC Scientific Assistant Electronics Question No: 93

Which of the following is best suited for satellite operation ?

Option A : LF

Option B : HF

Option C : SHF

Option D : VHF

Option D : VHF

SSC Scientific Assistant Electronics Question No: 94

Wavelength of 0.5 m lies in which of the following frequency range ?

Option A : UHF

Option B : VHF

Option C : LF

Option D : SHF

Option A :UHF

SSC Scientific Assistant Electronics Question Paper No: 95

Electrons flows in conductors because there ________

Option A : are free and mobile electrons

Option B : are free and mobile positive ions

Option C : are free and mobile protons

Option D : are free and mobile negative ions

Option A : are free and mobile electrons

SSC Scientific Assistant Electronics No: 96

Ceramics’ are easy to shape, hence they are used in making ________.

Option A : catalysts

Option B : conductors

Option C : electrolytes

Option D : insulators

Option D : insulators

SSC Scientific Assistant Electronics Question No: 97

A dielectric is introduced between the plates of a parallel plate capacitor. What happens to the capacitance of the capacitor?

Option A : Capacitance decreases

Option B : Capacitance increases

Option C : Capacitance is doubled

Option D : Capacitance is halved

Option B : Capacitance increases

SSC Scientific Assistant Electronics Paper No: 98

The inductor follows the ________.

Option A : De Morgan’s theorem

Option B : Fleming’s left hand rule

Option C : Fleming’s right hand rule

Option D : Lens Law

Option D : Lens Law

SSC Scientific Assistant Electronics Paper No: 99

When two resistors of the same value are connected in a series with a third resistance of the same value as the other two, than what will be the net effective resistance ?

Option A : Net resistance decreases

Option B : Net resistance increases

Option C : Net resistance is doubled

Option D : Net resistance is tripled

Option D : Net resistance is tripled

Previous Year Question SSC Scientific Assistant Electronics: 100

The varactor diode is used as a ________.

Option A : constant current source

Option B : constant voltage source

Option C : voltage controlled capacitor

Option D : voltage multiplier