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Hi Ashok,

This is the feedback I got for question # XXXXX #3 and #4. Is it possible to correct # XXXXX and 4?

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http://www.justanswer.com/math/5rmss-1-60-hz-circuit-such-house-wiring-voltage-varies.html

#2. INCORRECT. Partial Credit. In the US, household voltage has the form of a sine wave with a period of 60 Hz (cycles per second). For the first half of a cycle, the voltage is positive. For the second half, the voltage is negative. The simple average of the voltage across an entire cycle would therefore be zero, which is not a physically useful value.

We avoid the zero-value problem by taking the voltage at all points across the cycle, squaring the values (which makes negative values positive), calculating the mean (average) of the squared values, and then "undoing" the first part of the process by taking the square root of the mean. The result is called the Root-Mean-Square (RMS) voltage. RMS is shorthand for "The square root of the mean values of the voltage, squared."

Average voltage in an AC (alternating current) system is defined as the Root-Mean-Square (RMS) voltage.

Vrms = (Vmax)/(sqrt 2) or Vrms = (Vmax)/(1.414), where Vmax is the maximum or peak voltage of the cycle. So, one measures the voltage in a typical home with an AC voltmeter it would read 120 VAC (volts alternating current). The peak voltage would be 170 volts. Of course, you can see that 170VAC/1.414 = 120VAC.

#3. Incorrect. Old problem solved!!! How did you happen to solve old problem from previous session? Avoid point loss; identify answers. I do not search or assume; you have to clearly state your answer. Example, ANSWER= Current = 1.5A

#4. Incorrect. Old problem solved!!! How did you happen to solve old problem from previous session?

This is the feedback I got for question # XXXXX #3 and #4. Is it possible to correct # XXXXX and 4?

Your prompt attention is highly appreciated.

Thanks.

http://www.justanswer.com/math/5rmss-1-60-hz-circuit-such-house-wiring-voltage-varies.html

#2. INCORRECT. Partial Credit. In the US, household voltage has the form of a sine wave with a period of 60 Hz (cycles per second). For the first half of a cycle, the voltage is positive. For the second half, the voltage is negative. The simple average of the voltage across an entire cycle would therefore be zero, which is not a physically useful value.

We avoid the zero-value problem by taking the voltage at all points across the cycle, squaring the values (which makes negative values positive), calculating the mean (average) of the squared values, and then "undoing" the first part of the process by taking the square root of the mean. The result is called the Root-Mean-Square (RMS) voltage. RMS is shorthand for "The square root of the mean values of the voltage, squared."

Average voltage in an AC (alternating current) system is defined as the Root-Mean-Square (RMS) voltage.

Vrms = (Vmax)/(sqrt 2) or Vrms = (Vmax)/(1.414), where Vmax is the maximum or peak voltage of the cycle. So, one measures the voltage in a typical home with an AC voltmeter it would read 120 VAC (volts alternating current). The peak voltage would be 170 volts. Of course, you can see that 170VAC/1.414 = 120VAC.

#3. Incorrect. Old problem solved!!! How did you happen to solve old problem from previous session? Avoid point loss; identify answers. I do not search or assume; you have to clearly state your answer. Example, ANSWER= Current = 1.5A

#4. Incorrect. Old problem solved!!! How did you happen to solve old problem from previous session?

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