rms voltage การใช้

• Or equivalently, in terms of the rms voltage " V " at the antenna terminals:
• The peak voltage to RMS voltage ratio does not maintain the same relationship as for a sine wave.
• By controlling the phase angle or trigger angle, the output RMS voltage of the load can be varied.
• The purpose of an AC Voltage Controller, or AC Regulator, is to vary the RMS voltage across the load while at a constant frequency.
• Telephones for example use low voltage cabling, but the ringing voltage from the central office is approximately 90 Volts peak AC and has an RMS voltage of 63V.
• The ratio of on to off time can be adjusted to vary the RMS voltage while maintaining a constant frequency with a technique called pulse width modulation ( PWM ).
• *On question 6 : Similar light bulbs connected to DC or to AC of the same RMS voltage will produce similar light and heat, and consume similar power initially.
• Please note that 120V AC is rms voltage, the peak is 170V . When hooking up 120V AC light to 120V DC, the light may be alot dimmer then expected.
• Attempts to measure noise in audio equipment as RMS voltage, using a simple level meter or voltmeter, do not produce useful results; a special noise-measuring instrument is required.
• Crosstalk between activated and non-activated pixels has to be handled properly by keeping the RMS voltage of non-activated pixels below the threshold voltage, while activated pixels are subjected to voltages above threshold.
• ;dBu or dBv : RMS voltage relative to In professional audio, equipment may be calibrated to indicate a " 0 " on the VU meters some finite time after a signal has been applied at an amplitude of.
• The term " RMS power " is sometimes erroneously used in the audio industry as a synonym for " mean power " or " average power " ( it is proportional to the square of the RMS voltage or RMS current in a resistive load ).
• There is another power factor that depends on THD . True power factor can be taken to mean the ratio between average real power and the magnitude of RMS voltage and current, pf _ { true } = \ frac { P _ { avg } } { V _ { rms } I _ { rms } }.
• In older vehicles, the tachometer is driven by the RMS voltage waves from the low tension ( LT ) side of the ignition coil, while on others ( and nearly all diesel engines, which have no ignition system ) engine speed is determined by the frequency from the ECU which derives the information from either the crankshaft or camshaft speed sensor.
• Intermodulation distortion in audio is usually specified as the root mean square ( RMS ) value of the various sum-and-difference signals as a percentage of the original signal's RMS voltage, although it may be specified in terms of individual component strengths, in decibels, as is common with standard tests include SMPTE standard RP120-1994 or almost  but not exactly  3 : 1 for example ).
• If the flux in the core is purely sinusoidal, the relationship for either winding between its "'rms voltage " "'E " rms of the winding, and the supply frequency " f ", number of turns " N ", core cross-sectional area " a " in m 2 and peak magnetic flux density " B " peak in Wb / m 2 or T ( tesla ) is given by the universal EMF equation: