# Amplitude: Quiz

Question 1: For example, the average power transmitted by an acoustic or ________ or by an electrical signal is proportional to the square of the RMS amplitude (and not, in general, to the square of the peak amplitude).

Question 2: Pulse amplitude is measured with respect to a specified reference and therefore should be modified by qualifiers, such as "average", "instantaneous", "peak", or "________".
Alternating currentArithmetic meanRoot mean squareSine wave

Question 3: However radio signals may be carried by electromagnetic radiation; the intensity of the radiation (________) or the frequency of the radiation (frequency modulation) is oscillated and then the individual oscillations are varied (modulated) to produce the signal.
Continuous waveAmplitude modulationSingle-sideband modulationFrequency-shift keying

Question 4: For waves on a string, or in medium such as ________, the amplitude is a displacement.
WaterEarthWater resourcesOxygen

Question 5: For instance, sound waves are oscillations in ________ and their amplitudes are proportional to the change in pressure during one oscillation.
WindAtmospheric pressurePrecipitation (meteorology)Lightning

Question 6: Semi-amplitude in fields such as ________ is understood to mean half the peak-to-peak amplitude[2] and is important in the search for exoplanets.
AstrophysicsAstronomyStarSun

Question 7: True RMS meters do exist but until recently have been considered more specialised equipment; the advent of ________ controlled meters has made them more common.
Reduced instruction set computer64-bitMicroprocessorCentral processing unit

Question 8: Such meters require the AC input to be first ________ and are really reading proportional to either rectified average or peak amplitude.
High-voltage direct currentVacuum tubeDiodeRectifier

Question 9: Pulse amplitude also applies to the amplitude of ________- and phase-modulated waveform envelopes.

Question 10: When dealing with ________ electrical power it is universal to specify RMS values of a sinusoidal waveform.
Electric currentElectricityTransformerAlternating current