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Radio frequency: Quiz


Question 1: Another property is the ability to appear to flow through paths that contain insulating material, like the ________ insulator of a capacitor.
DielectricPermittivityMaxwell's equationsMetamaterial

Question 2: This property is exploited by 'high frequency' units used in electric ________, although strictly speaking these machines do not typically employ frequencies within the HF band.
Arc weldingGas tungsten arc weldingGas metal arc weldingShielded metal arc welding

Question 3: In order to receive radio signals, for instance from AM/FM radio stations, a ________ must be used.
Antenna (radio)Dipole antennaParabolic antennaHelical antenna

Question 4: [2] This is typically done via a resonator (in its simplest form, a circuit with a ________ and an inductor).
Electronic componentElectrical impedanceCapacitanceCapacitor

Question 5: Radio frequency (RF) radiation is a subset of electromagnetic radiation with a wavelength of 100km to 1mm, which is a frequency of 3 ________ to 300 GHz,[1] respectively.
HertzJouleVoltPascal (unit)

Question 6: Like other subsets of electromagnetic radiation, RF travels at the ________.
PhotonSunSpeed of lightOptics

Question 7: This range of electromagnetic radiation constitutes the radio spectrum and corresponds to the frequency of ________ electrical signals used to produce and detect radio waves.
Electric currentElectricityTransformerAlternating current

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