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
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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
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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
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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
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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 signal
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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Option C : voltage controlled capacitor
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