SUBELEMENT T4 – Radio and electronic fundamentals – 5 exam questions – 5 groups
T4A – Names of electrical units, DC and AC, what is a radio signal, conductors and insulators, electrical components - 1 exam question
Electrical current is measured in which of the following units?
Electrical Power is measured in which of the following units?
What is the name for the flow of electrons in an electric circuit?
What is the name of a current that flows only in one direction?
What is the standard unit of frequency?
How much voltage does an automobile battery usually supply?
What is the basic unit of resistance?
What is the name of a current that reverses direction on a regular basis?
Which of the following is a good electrical conductor?
Which of the following is a good electrical insulator?
What is the term used to describe opposition to current flow in ordinary conductors such as wires?
What instrument is used to measure the flow of current in an electrical circuit?
What instrument is used to measure Electromotive Force (EMF) between two points such as the poles of a battery?
T4B – relationship between frequency and wavelength, identification of bands, names of frequency ranges, types of waves – 1 exam question
What is the name for the distance a radio wave travels during one complete cycle?
What term describes the number of times that an alternating current flows back and forth per second?
What does 60 hertz (Hz) mean?
Electromagnetic waves that oscillate more than 20,000 times per second as they travel through space are generally referred to as what?
How fast does a radio wave travel through space?
How does the wavelength of a radio wave relate to its frequency?
What is the formula for converting frequency to wavelength in meters?
What are sound waves in the range between 300 and 3000 Hertz called?
What property of a radio wave is often used to identify the different bands amateur radio operators use?
What is the frequency range of the 2 meter band in the United States?
What is the frequency range of the 6 meter band in the United States?
What is the frequency range of the 70 centimeter band in the United States?
T4C - How radio works: receivers, transmitters, transceivers, amplifiers, power supplies, types of batteries, service life – 1 exam question
What is used to convert radio signals into sounds we can hear?
What is used to convert sounds from our voice into radio signals?
What two devices are combined into one unit in a transceiver?
What device is used to convert the alternating current from a wall outlet into low-voltage direct current?
What device is used to increase the output of a 10 watt radio to 100 watts?
Which of the battery types listed below offers the longest life when used with a hand-held radio, assuming each battery is the same physical size?
What is the nominal voltage per cell of a fully charged nickel-cadmium battery?
What battery type on this list is not designed to be re-charged?
What is required to keep rechargeable batteries in good condition and ready for emergencies?
What is the best way to get the most amount of energy from a battery?
T4D – Ohms law relationships – 1 exam question
What formula is used to calculate current in a circuit?
What formula is used to calculate voltage in a circuit?
What formula is used to calculate resistance in a circuit?
What is the resistance of a circuit when a current of 3 amperes flows through a resistor connected to 90 volts?
What is the resistance in a circuit where the applied voltage is 12 volts and the current flow is 1.5 amperes?
What is the current flow in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms?
What is the voltage across the resistor if a current of 0.5 amperes flows through a 2 ohm resistor?
What is the voltage across the resistor if a current of 1 ampere flows through a 10 ohm resistor?
What is the voltage across the resistor if a current of 2 amperes flows through a 10 ohm resistor?
What is the current flowing through a 100 ohm resistor connected across 200 volts?
What is the current flowing through a 24 ohm resistor connected across 240 volts?
T4E - Power calculations, units, kilo, mega, milli, micro - 1 exam question
What unit is used to describe electrical power?
What is the formula used to calculate electrical power in a DC circuit?
How much power is represented by a voltage of 13.8 volts DC and a current of 10 amperes?
How much power is being used in a circuit when the voltage is 120 volts DC and the current is 2.5 amperes?
How can you determine how many watts are being drawn by your transceiver when you are transmitting?
How many amperes are flowing in a circuit when the applied voltage is 120 volts DC and the load is 1200 watts?
How many milliamperes is the same as 1.5 amperes?
What is another way to specify the frequency of a radio signal that is oscillating at 1,500,000 Hertz?
How many volts are equal to one kilovolt?
How many volts are equal to one microvolt?
How many watts does a hand-held transceiver put out if the output power is 500 milliwatts?