Electronics and Communication Engineering - Measurements and Instrumentation - Discussion
Discussion Forum : Measurements and Instrumentation - Section 1 (Q.No. 31)
31.
A full wave rectifier type meter is used to measure the wave shape shown in figure. The voltmeter is calibrated to read rms value of sine wave. The reading of voltmeter will be
100 V
111 V
Answer: Option
Explanation:
Peak value of sine wave = 100 x 1.11 = 111 V.
Discussion:
11 comments Page 1 of 2.
Satyanarayan chand said:
7 years ago
Full-wave Rectifier Average Value.
Then we can see that a full-wave rectifier circuit converts BOTH the positive or negative halves of an AC waveform into a pulsed DC output that has a value of 0.637 * AMAX or 0.9 * ARMS.
So, 0.637 * 100 = 63.7 and 63.7 * 1.11 = 70.7 is the answer.
Then we can see that a full-wave rectifier circuit converts BOTH the positive or negative halves of an AC waveform into a pulsed DC output that has a value of 0.637 * AMAX or 0.9 * ARMS.
So, 0.637 * 100 = 63.7 and 63.7 * 1.11 = 70.7 is the answer.
Ravi shanakar meena said:
8 years ago
RMS=FF*Avg.
As this instrument is calibrated for sine wave
Therefore it uses FF=1.11( BY DEFAULT full bridge rectifier)
and this square wave is fed to FWR, therefore the output will have the Avg of 100V.
so,RMS=1.11*100=111.
As this instrument is calibrated for sine wave
Therefore it uses FF=1.11( BY DEFAULT full bridge rectifier)
and this square wave is fed to FWR, therefore the output will have the Avg of 100V.
so,RMS=1.11*100=111.
R.paul said:
9 years ago
1.11 is "form factor".
Yurekha said:
9 years ago
Peak value= RMS * 1.414(value to be multiplied in case of the sine wave).
100 = RMS * 1.414
RMS = 100/1.414 i.e. 100/√2.
Then, How we get 1.11?
100 = RMS * 1.414
RMS = 100/1.414 i.e. 100/√2.
Then, How we get 1.11?
Ullas S S said:
9 years ago
As the given signal is different from regular sign wave , to get the RMS value we should multiply 1.11 to peak voltage.
Ajay said:
9 years ago
"The voltmeter is calibrated to read rms value of sine wave".
Why it is reading peak value?
Why it is reading peak value?
Sreelekshmi said:
9 years ago
I think RMS value is for sine.
Shinu said:
9 years ago
I think the wave shape is supposed to be a sine wave, not square.
Saad said:
9 years ago
From where did you got 1.11?
Ppn said:
9 years ago
I agree with Mintokz, The peak value is 100.
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