Hi students, Welcome to Amans Maths Blogs (AMBIPi). Are you preparing for SSC Scientific Assistant and looking for SSC IMD Scientific Assistant Electronics Scientific Assistant Questions 61 to 80 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 IMD Scientific Assistant Electronics No: 61
What will be the change in transmitted power (in Watt) if the antenna current which was 800 mA at 50 W is reduced to 500 mA ?
Option A : 12.5
Option B : 19.53
Option C : 30.47
Option D : 37.5
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Option C : 30.47
SSC IMD Scientific Assistant Electronics Question No: 62
An AM broadcast station is found to be transmitting modulating frequencies up to kHz and the station is allowed to transmit on a frequency of 950 kHz, than what will be the bandwidth ( in kHz) allotted to the station ?
Option A : 5
Option B : 10
Option C : 20
Option D : 25
Show/Hide Answer Key
Option B : 10
SSC IMD Scientific Assistant Electronics Question No: 63
What will be the power transmitted (in Watt) by the AM transmitter if the carrier wave power is 150 W and the carrier wave is 60% modulated ?
Option A : 1.5
Option B : 13.5
Option C : 16.5
Option D : 25.5
Show/Hide Answer Key
Option B : 25.5
SSC IMD Scientific Assistant Electronics Question No: 64
What is the percentage of power saved when an 80% modulated wave is transmitted over SSB-SC, which was initially transmitted over AM ?
Option A : 0.8568
Option B : 0.8666
Option C : 0.8788
Option D : 0.89888
Show/Hide Answer Key
Option C : 0.8788
SSC IMD Scientific Assistant Electronics Question Paper No: 65
What is the power transmitted (in W ) by a DSB – SC signal when the carrier wave power is 80 W and modulation index is 0.4 ?
Option A : 6.4
Option B : 9.8
Option C : 12.6
Option D : 16.2
Show/Hide Answer Key
Option A : 6.4
SSC IMD Scientific Assistant Electronics Question No: 66
Calculate the antenna current (in A ) having impedance of 20 Ohms if a 60% amplitude modulated wave is a transmitted with the help of 50 W carrier wave.
Option A : 1.03
Option B : 1.28
Option C : 1.69
Option D : 1.72
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Option D : 1.72
SSC IMD Scientific Assistant Electronics Question No: 67
Which of the following part of the carrier wave is affected during the modulation in AM ?
Option A : Amplitude
Option B : Frequency
Option C : Phase
Option D : Angle
Show/Hide Answer Key
Option A : Amplitude
SSC IMD Scientific Assistant Electronics Question Paper No: 68
Which of the followings are associated with AM ?
I DSB- FC
II DSB-SC
III SSB SC
IV VSB
Option A : I only
Option B : II only
Option C : II and III only
Option D : I , II , III and IV
Show/Hide Answer Key
Option C : I and III only
SSC IMD Scientific Assistant Electronics Question Paper No: 69
Which of the following is not TRUE about the power of a FM signal if the modulation index becomes halved?
Option A : Power becomes the more times previous value
Option B : Power becomes two times the previous value
Option C : Power remains same
Option D : Power becomes half of the previous value
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Option C : Power remains same
SSC IMD Scientific Assistant Electronics Previous Year Question: 70
Which of the following contains a limiter stage, a discriminator and a de-emphasis circuit ?
Option A : Direct FM transmitter
Option B : Indirect FM transmitter
Option C : Double side band AM receiver
Option D : FM receiver
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Option D : FM reciever
SSC IMD Scientific Assistant Electronics Question No: 71
Calculate the carrier swing (in kHz) of the FM signal if a 90 MHz carrier is frequency modulated by 10 kHz and having a frequency deviation of 60 kHz.
Option A : 60
Option B : 90
Option C : 100
Option D : 120
Show/Hide Answer Key
Option D : 120
SSC IMD Scientific Assistant Electronics Question No: 72
Choose the area where the pulse modulation is used ?
I Radio Navigation
II Automatic Flight Landing Equipment
III Data Communications
Option A : I only
Option B : II only
Option C : III only
Option D : I , II and III only
Show/Hide Answer Key
Option d : I , II and III only
SSC IMD Scientific Assistant Electronics Year Question No: 73
Which of the following is associated with pulse modulation ?
Option A : Gamma waves
Option B : LF band
Option C : Microwave
Option D : Telegraphy
Show/Hide Answer Key
Option C : Microwave
SSC IMD Scientific Assistant Electronics Question No: 74
Which of the following is the advantage of AM over FM ?
Option A : High quality
Option B : Large coverage area
Option C : Low interface
Option D : Noise reduction
Show/Hide Answer Key
Option B : Large coverage area
SSC IMD Scientific Assistant Electronics Paper No: 75
Which of the following are the reasons for the use of narrow-band FM rather than white- band FM.
I It improves signal to noise ratio
II It reduces inter-channel interface
III Efficient use of power for better coverage
Option A : I , II and III only
Option B : II and III only
Option C : I and II only
Option D : III only
Show/Hide Answer Key
Option A : I , II and III only
SSC IMD Scientific Assistant Electronics Question No: 76
What are the new frequencies outside the regular spectrum called ?
Option A : Distortion
Option B : Harmonics
Option C : Interference
Option D : Splatter
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Option D : Splatter
SSC IMD Scientific Assistant Electronics Question No: 77
What is the correct sequence of the blocks in an AM receiver from the receiving the signal to output ?
Option A : RF amplifier – Mixer – IF amplifier – Demodulator – Audio amplifier
Option B : RF amplifier – Mixer – IF amplifier – Audio amplifier
Option C : IF amplifier – Demodulator – RF amplifier – Mixer – Audio amplifier
Option D : Audio amplifier – Mixer – Demodulator – IF amplifier – RF amplifier
Show/Hide Answer Key
Option A : RF amplifier – Mixer – IF amplifier – Demodulator – Audio amplifier
SSC IMD Scientific Assistant Electronics Question Paper No: 78
What is the Nyquist time interval (in ms) between two successive samples while sampling a signal having maximum frequency of 5 kHz?
Option A : 0.01
Option B : 0.1
Option C : 1
Option D : 10
Show/Hide Answer Key
Option A : 0.1
SSC IMD Scientific Assistant Electronics Question Paper No: 79
Which of the following is TRUE when the sampling time becomes less than the Nyquist interval ?
Option A : Original signal can be recreated
Option B : Bandwidth decreases
Option C : Bandwidth increases
Option D : Channel capacity decreases
Show/Hide Answer Key
Option A : Original signal can be recreated
Previous Year Question SSC IMD Scientific Assistant Electronics: 80
Which of the followings are digital modulation techniques ?
I SSB – SC
II PCM
III Delta Modulation
IV VSB
Option A : II and IV only
Option B : III and IV only
Option C : I and IV only
Option D : I and II only
Show/Hide Answer Key
Option D : I and II only
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| SSC General Intelligence Previous Year Questions | 1 to 20 | 21 to 40 | 41 to 60 | 61 to 75 |
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| SSC Electronics Previous Year Questions | 1 to 20 | 21 to 40 | 41 to 60 | 61 to 80 | 81 to 100 101 to 120 | 121 to 140 | 141 to 160 | 161 to 180 | 181 to 200 | 201 to 220 | 221 to 240 | 241 to 260 | 261 to 280 | 281 to 295 | |
