Jkp Constable Telecommunication Telecommunication Mcqs Jkp Constable (1089 MCQs) | JKSSB & SSC Quiz

jkp constable telecommunication

telecommunication mcqs jkp constable

Download PDF

Topics

telecommunication mcqs jkp constable

Practice Questions

1089 Total
Question 1081 Discuss
Ask a Friend

Calculate the magnetic flux density (B) if a magnetic flux of 0.05 Webers passes perpendicularly through an area of 0.25 square meters.

A
0.0125 Tesla
B
0.2 Tesla
C
5.0 Tesla
D
1.25 Tesla

Answer & Explanation

Correct Option: B

Magnetic flux density B = Flux / Area. B = 0.05 Wb / 0.25 m^2 = 0.2 Tesla (or Wb/m^2).
Question 1082 Discuss
Ask a Friend

For a pure inductive circuit connected to an AC source, which parameter consumes actual real power (Watts)?

A
The applied voltage
B
The magnetic field
C
The internal wire resistance
D
A pure inductor consumes zero real power

Answer & Explanation

Correct Option: D

In a theoretically perfect inductor, current lags voltage by 90 degrees. Power factor cos(90) = 0. Therefore, real average power consumed over a full cycle is zero.
Question 1083 Discuss
Ask a Friend

Which of the following describes the function of a 'Tuner' module in a traditional television receiver?

A
To drive the loud speakers
B
To convert interlaced video to progressive scan
C
To select a specific RF channel frequency and convert it to a standard IF
D
To apply high voltage to the picture tube

Answer & Explanation

Correct Option: C

The tuner section isolates the desired broadcast channel frequency from the antenna's wideband reception and beats it down via a local oscillator to a common Intermediate Frequency.
Question 1084 Discuss
Ask a Friend

A step-down transformer has a turns ratio of 10:1. If the primary is supplied with 240V AC, what is the unloaded secondary voltage?

A
2400 V
B
24 V
C
120 V
D
12 V

Answer & Explanation

Correct Option: B

The voltage ratio equals the turns ratio. Vp / Vs = Np / Ns. 240 / Vs = 10 / 1. Therefore, Vs = 24 Volts.
Question 1085 Discuss
Ask a Friend

In India's e-Governance architecture, what is the primary role of the National Informatics Centre (NIC)?

A
To collect physical taxes from citizens
B
To manufacture network hardware
C
To act as the premier ICT organization providing technology support to the Government
D
To regulate private telecom operators like Airtel and Jio

Answer & Explanation

Correct Option: C

NIC provides the backbone network and IT services for e-Governance, developing apps, hosting government data centers, and running the NICNET across ministries and districts.
Question 1086 Discuss
Ask a Friend

Identify the primary benefit of deploying 'Earthing' or 'Grounding' in electrical systems.

A
To double the available voltage for appliances
B
To provide a safe, low-resistance path for leakage and fault currents
C
To act as a backup power source during blackouts
D
To eliminate the need for circuit breakers

Answer & Explanation

Correct Option: B

Grounding connects the metallic body of equipment to the earth, ensuring that if a live wire touches the casing, the heavy fault current bypasses humans and goes to the ground.
Question 1087 Discuss
Ask a Friend

In antenna theory, the 'Half-Power Beamwidth' refers to the angular separation between two points on the main radiation lobe where:

A
Voltage drops to zero
B
Radiated power drops to 50% (-3 dB) of its maximum value
C
Current is precisely doubled
D
The impedance is strictly real

Answer & Explanation

Correct Option: B

HPBW is a key directivity metric. It is the angle between the points on either side of the peak radiation where the power intensity has fallen to one-half (which is approx -3dB).
Question 1088 Discuss
Ask a Friend

Why is 'Fading' mostly problematic in shortwave radio (sky wave) communications compared to FM broadcasts?

A
FM broadcasts do not travel through the air
B
Shortwaves bounce off the unstable ionosphere, causing multipath phase cancellation
C
Shortwaves lack sufficient transmitter power
D
FM receivers are legally required to be more expensive

Answer & Explanation

Correct Option: B

The ionosphere's density and height change continuously. Sky waves taking different paths reflect and arrive at the receiver slightly out of phase, destructively interfering (fading).
Question 1089 Discuss
Ask a Friend

What function does the 'Demodulator' block serve in an AM receiver system?

A
It amplifies the weak RF signal picked up by the antenna
B
It strips the high-frequency RF carrier wave away to recover the low-frequency audio baseband
C
It drives the loudspeaker coil
D
It steps up the incoming voltage from the power supply

Answer & Explanation

Correct Option: B

Demodulation (or detection) is the reverse of modulation. An envelope detector, for example, rectifies and filters the modulated IF signal to output just the original sound envelope.
Previous Next