Review Questions 1. The Figure 1.8 shows an oscilloscope...

Review Questions 1. The Figure 1.8 shows an oscilloscope screen displaying an AC voltage. The oscilloscope is set to 1 Volt/div and 5ms/div. What is the rms voltage and frequency of this signal? A. 3 V, 60 Hz B. 2.12 V, 33.33 Hz C. 1 V, 1.2 kHz D. 0.3 V, 30 ms Figure 1.8 Oscilloscope output 2. With an oscilloscope you can: A. Calculate the frequency of a signal. B. Find malfunction electrical components. C. Analyze signal details. D. All of the above. 3. If the seconds/div is set at 0.1ms, the amount of time represented by the width of the screen is: A. 0.1 ms. B. 1 ms. C. 1 s. D. 0.1 kHz.

Transcript

00:01 Hi everyone, so in africa we have to given the oscilloscope screen displayed on ac voltage and in the screen what is given that one division, one vertical division is equal to one vertical division on the screen is equal to one point.

00:24 Okay and one horizontal division on the screen and one horizontal division on the screen and one horizontal division division is equal to 5m.

00:40 Okay, so this one vertical division, this is 1 volt and this one vertical division is 5m.

00:49 Okay, that is given to us in the motion.

00:52 So what we have to find out, we have to find out the value of rms voltage.

00:58 So hence we know that peak voltage, that means the peak of the peak of the peak of the curve that is obtained here that is maximum and 3 okay so this peak voltage is 3 here so this is equal to 3 division okay and 3 division will be equal to 3 multiply by 1 1 watt okay so the peak voltage is 3 volt and the rms voltage will be rms voltage will be equal to peak voltage duetid by under the root of 2.

01:42 So peak voltage is 3 volt duetit by under the root of 2.

01:46 So this will be equal to 3, dwighted by 1 .414 and by dividing this report this is equal to 2 .12.

01:55 This is the value of rms voltage.

01:57 Then we have to find out the value of rms current here.

02:00 So you know that time period it will be equal to time period is equal to six division okay, 5 ams the time period here so time period is equal to six division so this will be equal to 6 multiplied by 5 ms for one division so this will be equal to 30 ms okay then 30 multiply by a 10 rs to the power minus three seconds this will be the time period here so the frequency will be equal to frequency will be equal to 1 .25 time period okay so one you added by time period is 30 multiplied by 10 x to the power minus t so this will be equal to 30 .3 .3 hr so this will be the frequency here okay so in the next part of the question what is the question saying that the option number option number b is correct in the first part of the that voltage is 2 .1 to volt and the frequency is 30 3 .3 hz okay and in the second part of the question they are saying that with an oscilloscope you can that an oscilloscope is an apparatus here and we can use the oscilloscope so we can we can use oscilloscope.

03:29 Use oscilloscope.

03:31 In we can use oscilloscope to the first point, we can calculate the frequency.

03:39 Okay, so oscilloscope can we use to calculate frequency.

03:44 We have already calculated this.

03:46 This is the frequency we calculate by using the oscilloscope really...

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