UK Amateur Radio Full Licence Exam Practice Questions - UK Amateur Radio Full Licence Examination (RSGB Ofcom) Exam - UK Amateur Radio Full Licence Exam Practice Questions - UK Amateur Radio Full Licence Examination (RSGB Ofcom) Exam

Question 1

What is the conduction angle of a transistor operating as a Class A linear RF amplifier?

360 degrees (the transistor conducts throughout the entire RF cycle) 180 degrees (the transistor conducts for half of the RF cycle) Between 180 and 360 degrees Less than 180 degrees (short pulses)

Correct Answer:

360 degrees (the transistor conducts throughout the entire RF cycle)

Question 2

Why is a Class C amplifier unsuitable for amplifying single-sideband (SSB) voice signals?

It has low RF output power capabilities It is non-linear and causes severe intermodulation distortion of amplitude-varying signals It exhibits negative input impedance at high frequencies It requires a dual symmetrical power supply

Correct Answer:

It is non-linear and causes severe intermodulation distortion of amplitude-varying signals

Question 3

What is the voltage gain ($A_v$) formula for an ideal inverting operational amplifier circuit with feedback resistor $R_f$ and input resistor $R_{in}$?

A_v = 1 + (R_f / R_{in}) A_v = R_{in} / R_f A_v = -R_f / R_{in} A_v = -(R_{in} / R_f)

Correct Answer:

A_v = -R_f / R_{in}

Question 4

In the equivalent electrical circuit of a quartz crystal unit, what condition occurs at the series resonant frequency ($f_s$)?

The inductive reactance of the motional arm equals the capacitive reactance of the motional arm, yielding minimum series impedance The total crystal impedance reaches its maximum value The parallel shunt capacitance $C_0$ dominates, blocking all AC current The Q factor of the crystal drops to zero

Correct Answer:

The inductive reactance of the motional arm equals the capacitive reactance of the motional arm, yielding minimum series impedance

Question 5

Which combination of reactive components forms the feedback network of a classic Colpitts LC oscillator?

A tapped inductor connected across a single tuning capacitor A quartz crystal in series with a variable inductor A resistor-capacitor phase-shift ladder network A capacitive voltage divider (two series capacitors) connected in parallel with an inductor

Correct Answer:

A capacitive voltage divider (two series capacitors) connected in parallel with an inductor

Exam overview

About this Exam

Prepare with the UK Amateur Radio Full Licence Exam Practice Questions - UK Amateur Radio Full Licence Examination (RSGB Ofcom) Exam practice quiz. This question bank includes 100 questions covering power, antenna, frequency, amplifier, and line. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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UK Amateur Radio Full Licence Exam Practice Questions - UK Amateur Radio Full Licence Examination (RSGB Ofcom) Exam

This practice set contains 100 questions from the matching question bank and focuses on power, antenna, frequency, amplifier, and line. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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UK Amateur Radio Full Licence Exam Practice Questions - UK Amateur Radio Full Licence Examination (RSGB Ofcom) Exam

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