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"It is about 170 volt." was the given answer to this question.
Incorrect. This would be the correct answer if question were "What is the 0-to-peak voltage of a 120 volt AC circuit?" The "120" represents the root-mean-square (rms) value of the voltage. To get the peak value of the sine wave for any such rms figure, you multiply the rms figure by the square root of 2 (~1.41), i.e. 120 x 1.41 = 170.
The PEAK-TO-PEAK voltage of the sine wave is simply twice the 0-to-peak value. Hence, the correct answer, for PEAK-TO-PEAK, is 170 x 2 = 340 volts.
So, the correct answer to the question is 340 volts.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agowell, the tolerance (it is called) in Australia is at around
±10 precent and countries using 120V have tolerances at about
±15 percent
Not sure if above is correct. In my talks with colleagues at distribution level voltages, voltage is kept within 8% of nominal, so this may be accurate (united states).
Individual products will have different handling capability of power supply variance. For example, AC motors will spin faster (which typically aides in cooling) and pull less current. They will burn out when the break down voltage of the electrical windings is reached, which is usually pretty high. A computer or LCD, on the other hand, can get cooked by simple, every day power spikes of 5-10 percent (if they land in the right frequency, and you're home gets hammered enough times). I recently fixed an LCD where 3 10volt capacitors had been blown by a power spike. To avoid future problems, I put on a battery backup with power quality control and replaced with 35 volt caps.
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∙ 15y agoRMS to peak, times 1.414. Peak to RMS times .707.
Wiki User
∙ 12y agoIt's enough in most cases; sometimes it's too much, sometimes it's a bit too little as well.
Wiki User
∙ 12y agoIn a 120 VAC, this refers to the RMS voltage. The peak voltage is (Vrms)*(√2), which is approximately 170 Volts (measured from the peak to zero).
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What is the ratio of a 480vac single phase and a 120 vac secondary voltage?
The ratio for a 480 VAC to 120 VAC is 4 to 1.
What is the average value of an AC voltage that has a maximun peak voltage of 80 VAC?
V_rms = V_peak / √2 so V_rms = 80/√2 = 56.6 V (3sf)
What does input volts and output volts mean?
The terminology would typically reference a device such as a power supply, charger, diverter or transformer. The Input Voltage is the voltage supplied to the device to make it work. The Output Voltage is what the device supplies to an application. For example, a power supply for a laptop might convert 120 VAC to a voltage like 19.5 volts (A Sony Laptop) for charging a laptop battery.
What are the acceptable power ranges for 480 vac equipment?
All electrical equipment, regardless of the voltage, should have a voltage supply that is no more than plus or minus 5 per cent of the equipments stated voltage requirement.
What is the difference of VAC to Voltage?
Voltage is a general term. VAC & VDC are specific terms.
What is the ratio of a 480vac single phase and a 120 vac secondary voltage?
The ratio for a 480 VAC to 120 VAC is 4 to 1.
Can you charge an electric shaver that uses a 3.8 VAC cord with a 7.5 VAC cord?
No, with electrical equipment the voltage has to match the supply voltage.
What is the ac voltage reading between the bare copper wire and the hot black wire 120 vac or zero volt?
Should be about 120 VAC.
What is the difference of peak and rms value?
RMS stands for "Root of the Means Squared", and is a mathematical method of defining the "operating" voltage of a sine wave power source. Typical home lighting and outlet voltage presently is 120 VAC (volts alternating current), 60 Hz. (Hertz, formerly referred to as "cycles per second".) But the PEAK voltage is the absolute maximum voltage at the "peak" of each sine wave of voltage. Mathematically, the "Peak" voltage is 1.414 (which is the square root of the number 2) times the RMS voltage, and conversely, the RMS voltage is 0.707 times the PEAK voltage.
How do you build a 120 vac - 24 vdc power supply?
i dont no
What is the peak value of a household appliance that uses a 230 VAC source?
Peak value is 1.414 times the RMS voltage. On a 240 volt circuit the peak voltage is 240 x 1.414 = 339.36 volts. The peak to peak value is twice this.
What is the typical breakover voltage for a DIAC used in an electronic control circuit in which 120 VAC?
about ~30v
What is the voltage AC recommended for home use?
In the United States, 110-120/240 VAC is the standard.
How many watts is light bulb 120 VAC 60Hz 300mA?
Multiply the current by the voltage: 120 times 0.3, which is 40 watts.
Is utility voltage ie 110 VAC given as a RMS value or as a Peak value?
All AC voltages and currents are expressed as rms values, unless otherwise specified. So 120 V AC is an rms value.
What is the average value of an AC voltage that has a maximun peak voltage of 80 VAC?
V_rms = V_peak / √2 so V_rms = 80/√2 = 56.6 V (3sf)
What does input volts and output volts mean?
The terminology would typically reference a device such as a power supply, charger, diverter or transformer. The Input Voltage is the voltage supplied to the device to make it work. The Output Voltage is what the device supplies to an application. For example, a power supply for a laptop might convert 120 VAC to a voltage like 19.5 volts (A Sony Laptop) for charging a laptop battery.
