Friday, April 12, 2024
Home > SSC Scientific Assistant > SSC IMD Scientific Assistant Electronics Questions 61 to 80 AMBIPi

# SSC IMD Scientific Assistant Electronics Questions 61 to 80 AMBIPi

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

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

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

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

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

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

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

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

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

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 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

Option D : 120

SSC IMD Scientific Assistant Electronics  Question No: 72

Choose the area where the pulse modulation is used ?

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

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

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

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

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

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

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

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

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