Category: Basic Electronics and Theory - Canada Radio Amateur Quiz License

Questions in this category:

B-005-001-001: If a dial marked in megahertz shows a reading of 3.525 MHz, what would it show if it were marked in kilohertz?
B-005-001-002: If an ammeter marked in amperes is used to measure a 3000 milliampere current, what reading would it show?
B-005-001-003: If a voltmeter marked in volts is used to measure a 3500 millivolt potential, what reading would it show?
B-005-001-004: How many microfarads is 1 000 000 picofarads?
B-005-001-005: If you have a hand-held transceiver which puts out 500 milliwatts, how many watts would this be?
B-005-001-006: A kilohm is:
B-005-001-007: 6.6 kilovolts is equal to:
B-005-001-008: A current of one quarter ampere may be written as:
B-005-001-009: How many millivolts are equivalent to two volts?
B-005-001-010: One megahertz is equal to:
B-005-001-011: An inductance of 10 000 microhenrys may be stated correctly as:
B-005-002-001: Name three good electrical conductors.
B-005-002-002: Name four good electrical insulators.
B-005-002-003: Why do resistors sometimes get hot when in use?
B-005-002-004: What is the best conductor among the following materials?
B-005-002-005: Which type of material listed will most readily allow an electric current to flow?
B-005-002-006: A length of metal is connected in a circuit and is found to conduct electricity very well. It would be best described as having a:
B-005-002-007: The letter ""R"" is the symbol for:
B-005-002-008: The reciprocal of resistance is:
B-005-002-009: Voltage drop means:
B-005-002-010: The resistance of a conductor changes with:
B-005-002-011: The most common material used to make a resistor is:
B-005-003-001: What is the word used to describe the rate at which electrical energy is used?
B-005-003-002: If you have light bulbs marked 40 watts, 60 watts and 100 watts, which one will use electrical energy the fastest?
B-005-003-003: What is the basic unit of electrical power?
B-005-003-004: Which electrical circuit will have no current?
B-005-003-005: Which electrical circuit draws too much current?
B-005-003-006: Power is expressed in:
B-005-003-007: Which of the following two quantities should be multiplied together to find power?
B-005-003-008: Which two electrical units multiplied together give the unit ""watts""?
B-005-003-009: A resistor in a circuit becomes very hot and starts to burn. This is because the resistor is dissipating too much:
B-005-003-010: High power resistors are usually large with heavy leads. The size aids the operation of the resistor by:
B-005-003-011: The resistor that could dissipate the most heat would be marked:
B-005-004-001: If a current of 2 amperes flows through a 50-ohm resistor, what is the voltage across the resistor?
B-005-004-002: How is the current in a DC circuit calculated when the voltage and resistance are known?
B-005-004-003: How is the resistance in a DC circuit calculated when the voltage and current are known?
B-005-004-004: How is the voltage in a DC circuit calculated when the current and resistance are known?
B-005-004-005: If a 12-volt battery supplies 0.25 ampere to a circuit, what is the circuit's resistance?
B-005-004-006: Calculate the value of resistance necessary to drop 100 volts with current flow of 0.8 milliamperes:
B-005-004-007: The voltage required to force a current of 4.4 amperes through a resistance of 50 ohms is:
B-005-004-008: A lamp has a resistance of 30 ohms and a 6 volt battery is connected. The current flow will be:
B-005-004-009: What voltage would be needed to supply a current of 200 milliamperes, to operate an electric lamp which has a resistance of 25 ohms?
B-005-004-010: The resistance of a circuit can be found by using one of the following:
B-005-004-011: If a 3 volt battery supplies 300 milliamperes to a circuit, the circuit resistance is:
B-005-005-001: In a parallel circuit with a voltage source and several branch resistors, how is the total current related to the current in the branch resistors?
B-005-005-002: Three resistors, respectively rated at 10, 15 and 20 ohms are connected in parallel across a 6-volt battery. Which statement is true?
B-005-005-003: Total resistance in a parallel circuit:
B-005-005-004: Two resistors are connected in parallel and are connected across a 40 volt battery. If each resistor is 1000 ohms, the total current is:
B-005-005-005: The total resistance of resistors connected in series is:
B-005-005-006: Five 10 ohm resistors connected in series equals:
B-005-005-007: Which series combination of resistors would replace a single 120 ohm resistor?
B-005-005-008: If ten resistors of equal value were wired in parallel, the total resistance would be:
B-005-005-009: The total resistance of four 68 ohm resistors wired in parallel is:
B-005-005-010: Two resistors are in parallel. Resistor A carries twice the current of resistor B, which means that:
B-005-005-011: The total current in a parallel circuit is equal to the:
B-005-006-001: Why would a large size resistor be used instead of a smaller one of the same resistance?
B-005-006-002: How many watts of electrical power are used by a 12 volt DC light bulb that draws 0.2 ampere?
B-005-006-003: The DC input power of a transmitter operating at 12 volts and drawing 500 milliamperes would be:
B-005-006-004: When two 500 ohm 1 watt resistors are connected in series, the maximum total power that can be dissipated by the resistors is:
B-005-006-005: When two 500 ohm 1 watt resistors are connected in parallel, they can dissipate a maximum total power of:
B-005-006-006: If the voltage applied to two resistors in series is doubled, how much will the total power change?
B-005-006-007: Which combination of resistors could make up a 50 ohms dummy load capable of safely dissipating 5 watts?
B-005-006-008: A 12 volt light bulb is rated at a power of 30 watts. The current drawn would be:
B-005-006-009: If two 10 ohm resistors are connected in series with a 10 volt battery, the power consumption would be:
B-005-006-010: One advantage of replacing a 50 ohm resistor with a parallel combination of two similarly rated 100 ohm resistors is that the parallel combination will have:
B-005-006-011: Resistor wattage ratings are:
B-005-007-001: What term means the number of times per second that an alternating current flows back and forth?
B-005-007-002: Approximately what frequency range can most humans hear?
B-005-007-003: Why do we call signals in the range 20 Hz to 20 000 Hz audio frequencies?
B-005-007-004: Electrical energy at a frequency of 7125 kHz is in what frequency range?
B-005-007-005: What is the name for the distance an AC signal travels during one complete cycle?
B-005-007-006: What happens to a signal's wavelength as its frequency increases?
B-005-007-007: What happens to a signal's frequency as its wavelength gets longer?
B-005-007-008: What does 60 hertz (Hz) mean?
B-005-007-009: If the frequency of the waveform is 100 Hz, the time for one cycle is:
B-005-007-010: Current in an AC circuit goes through a complete cycle in 0.1 second. This means the AC has a frequency of:
B-005-007-011: A signal is composed of a fundamental frequency of 2 kHz and another of 4 kHz. This 4 kHz signal is referred to as:
B-005-008-001: A two-times increase in power results in a change of how many dB?
B-005-008-002: How can you decrease your transmitter's power by 3 dB?
B-005-008-003: How can you increase your transmitter's power by 6 dB?
B-005-008-004: If a signal-strength report is ""10 dB over S9""
B-005-008-005: If a signal-strength report is ""20 dB over S9""
B-005-008-006: The unit ""decibel"" is used to indicate:
B-005-008-007: The power output from a transmitter increases from 1 watt to 2 watts. This is a dB increase of:
B-005-008-008: The power of a transmitter is increased from 5 watts to 50 watts by a linear amplifier. The power gain, expressed in dB, is:
B-005-008-009: You add a 9 dB gain amplifier to your 2 watt handheld. What is the power output of the combination?
B-005-008-010: The power of a transmitter is increased from 2 watts to 8 watts. This is a power gain of __________ dB.
B-005-008-011: A local amateur reports your 100W 2M simplex VHF transmission as 30 dB over S9. To reduce your signal to S9, you would reduce your power to ______ watts.
B-005-009-001: If two equal-value inductors are connected in series, what is their total inductance?
B-005-009-002: If two equal-value inductors are connected in parallel, what is their total inductance?
B-005-009-003: If two equal-value capacitors are connected in series, what is their total capacitance?
B-005-009-004: If two equal-value capacitors are connected in parallel, what is their total capacitance?
B-005-009-005: What determines the inductance of a coil?
B-005-009-006: What determines the capacitance of a capacitor?
B-005-009-008: To replace a faulty 10 millihenry choke, you could use two:
B-005-009-009: Three 15 microfarad capacitors are wired in series. The total capacitance of this arrangement is:
B-005-009-010: Which series combinations of capacitors would best replace a faulty 10 microfarad capacitor?
B-005-009-011: The total capacitance of two or more capacitors in series is:
B-005-010-001: How does a coil react to AC?
B-005-010-002: How does a capacitor react to AC?
B-005-010-003: The reactance of capacitors increases as:
B-005-010-004: In inductances, AC may be opposed by both resistance of winding wire and reactance due to inductive effect. The term which includes resistance and reactance is:
B-005-010-005: Capacitive reactance:
B-005-010-006: Inductive reactance may be increased by:
B-005-010-007: What property allows a coil wound on a ferrite core to mitigate the effects of an offending radio signal?
B-005-010-008: What property allows an RF bypass capacitor on an audio circuit to divert an offending radio signal?
B-005-010-009: What property allows an RF bypass capacitor to have little effect on an audio circuit?
B-005-010-010: What property allows an RF choke coil to have little effect on signals meant to flow through the coil?
B-005-010-011: In general, the reactance of inductors increases with:
B-005-011-001: If no load is attached to the secondary winding of a transformer, what is current in the primary winding called?
B-005-011-002: A transformer operates a 6.3 volt 2 ampere light bulb from its secondary winding. The input power to the primary winding is approximately:
B-005-011-003: A transformer has a 240 volt primary that draws a current of 250 milliamperes from the mains supply. Assuming no losses and only one secondary, what current would be available from the 12 volt secondary?
B-005-011-004: In a mains power transformer, the primary winding has 250 turns, and the secondary has 500. If the input voltage is 120 volts, the likely secondary voltage is:
B-005-011-005: The strength of the magnetic field around a conductor in air is:
B-005-011-006: Maximum induced voltage in a coil occurs when:
B-005-011-007: The voltage induced in a conductor moving in a magnetic field is at a maximum when the movement is:
B-005-011-008: A 100% efficient transformer has a turns ratio of 1/5. If the secondary current is 50 milliamperes, the primary current is:
B-005-011-009: A force of repulsion exists between two _________ magnetic poles.
B-005-011-010: A permanent magnet would most likely be made from:
B-005-011-011: The fact that energy transfer from primary to secondary windings in a power transformer is not perfect is indicated by:
B-005-012-001: Resonance is the condition that exists when:
B-005-012-002: Parallel tuned circuits offer:
B-005-012-003: Resonance is an electrical property used to describe:
B-005-012-004: A tuned circuit is formed from two basic components. These are:
B-005-012-005: When a parallel coil-capacitor combination is supplied with AC of different frequencies, there will be one frequency where the impedance will be highest. This is the:
B-005-012-006: In a parallel-resonant circuit at resonance, the circuit has a:
B-005-012-007: In a series resonant circuit at resonance, the circuit has:
B-005-012-008: A coil and an air-spaced capacitor are arranged to form a resonant circuit. The resonant frequency will remain the same if we:
B-005-012-009: Resonant circuits in a receiver are used to:
B-005-012-010: Resonance is the condition that exists when:
B-005-012-011: When a series LCR circuit is tuned to the frequency of the source, the:
B-005-013-001: How is a voltmeter usually connected to a circuit under test?
B-005-013-002: How is an ammeter usually connected to a circuit under test?
B-005-013-003: What does a multimeter measure?
B-005-013-004: The correct instrument to measure plate current or collector current of a transmitter is:
B-005-013-005: Which of the following meters would you use to measure the power supply current drawn by a small hand-held transistorized receiver?
B-005-013-006: When measuring current drawn from a DC power supply, it is true to say that the meter will act in circuit as:
B-005-013-007: When measuring the current drawn by a receiver from a power supply, the current meter should be placed:
B-005-013-008: Potential difference is measured by means of:
B-005-013-009: The instrument used for measuring the flow of electrical current is the:
B-005-013-010: In measuring volts and amperes, the connections should be made with: