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

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Practice Questions

1089 Total
Question 1041 Discuss
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In e-Governance, a 'G2C' service primarily refers to interactions between:

A
Government agencies to other Governments
B
Government directly to Citizens
C
Government agencies to Corporate entities
D
Citizens communicating directly with each other

Answer & Explanation

Correct Option: B

G2C stands for Government-to-Citizen. Examples include online passport applications, tax filing portals, and digital land records accessible to the public.
Question 1042 Discuss
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What happens if you supply DC voltage instead of AC to the primary winding of a standard transformer?

A
The transformer steps up the DC voltage
B
The secondary winding outputs a smooth AC voltage
C
The primary winding will likely burn out due to low resistance
D
The core becomes permanently demagnetized

Answer & Explanation

Correct Option: C

DC does not provide a changing magnetic flux, meaning no back EMF is induced. Only the small copper resistance limits current, drawing massive current and burning the coil.
Question 1043 Discuss
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Calculate the time period of a standard 50 Hz alternating current supply.

A
0.05 seconds
B
0.02 seconds
C
2.0 seconds
D
50 seconds

Answer & Explanation

Correct Option: B

Time period T = 1 / f. T = 1 / 50 = 0.02 seconds (or 20 milliseconds).
Question 1044 Discuss
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Which motor provides the highest starting torque and is thus heavily used for traction applications like electric trains?

A
AC Synchronous motor
B
DC Shunt motor
C
DC Series motor
D
Split-phase induction motor

Answer & Explanation

Correct Option: C

In a DC series motor, torque is proportional to the square of the armature current (T ∝ Ia^2). At startup, high current produces massive starting torque.
Question 1045 Discuss
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The primary advantage of FM over AM in analog radio broadcasting is:

A
Lower bandwidth requirement
B
Ability to cover larger geographical areas
C
Higher immunity against atmospheric and electrical noise
D
Simpler and cheaper receiver circuits

Answer & Explanation

Correct Option: C

Noise predominantly affects signal amplitude. Since FM encodes information in frequency variations and clips amplitude variations, it offers exceptional noise immunity.
Question 1046 Discuss
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Which of the following defines the condition of 'Critical Damping' in an analog indicating instrument like an ammeter?

A
The pointer oscillates indefinitely before stopping
B
The pointer reaches its final steady position without any oscillation
C
The pointer moves extremely slowly to its final position
D
The pointer fails to return to zero

Answer & Explanation

Correct Option: B

Critical damping represents the exact boundary between underdamped (oscillating) and overdamped (sluggish), allowing the pointer to settle to its reading in the fastest time with zero overshoot.
Question 1047 Discuss
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What does a standing wave pattern on a transmission line indicate?

A
Perfect impedance matching
B
Infinite transmission velocity
C
Impedance mismatch and reflection
D
Complete absorption of the signal

Answer & Explanation

Correct Option: C

Standing waves are formed by the interference of the forward-traveling wave and the wave reflected back from the load. Reflection occurs only when there is an impedance mismatch.
Question 1048 Discuss
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A 100 Hz square wave can be mathematically represented as a combination of sine waves. Which of the following best describes this composition?

A
Only a single 100 Hz sine wave
B
A fundamental 100 Hz sine wave plus its even harmonics
C
A fundamental 100 Hz sine wave plus its odd harmonics
D
Sine waves of continuous frequencies from 0 to 100 Hz

Answer & Explanation

Correct Option: C

According to Fourier analysis, a perfect square wave is composed of a fundamental sine wave (at the same frequency) and an infinite sum of odd integer harmonics.
Question 1049 Discuss
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To convert a moving coil galvanometer into a voltmeter capable of measuring higher voltages, one must connect a:

A
Low resistance in parallel
B
Low resistance in series
C
High resistance in parallel
D
High resistance in series

Answer & Explanation

Correct Option: D

A high resistance multiplier is connected in series with the galvanometer coil to limit the current drawn from the test circuit and drop the excess voltage.
Question 1050 Discuss
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In digital electronics, what is the principal function of a multiplexer (MUX)?

A
To convert serial data to parallel data
B
To route one of many inputs to a single output line based on select lines
C
To decode binary numbers into decimal segments
D
To store binary information temporarily

Answer & Explanation

Correct Option: B

A multiplexer acts as a digital switch, selecting information from one of 'N' input lines and forwarding it to a single output line, controlled by selection pins.
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