Physics ECAT Pre Engineering Chapter 16 Alternating Current Online Test With Answers

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Physics ECAT Pre Engineering Chapter 16 Alternating Current Online Test

Sr. # Questions Answers Choice
1 The basic circuit element in D.C. circuit is: A capacitor A resistor An inductor Both (A) and (C) Both (A) and (B)
2 The basic circuit element in A.C. circuits are: Resistor and capacitor Resistor and Inductor Capacitor only Both (B) and (C) None of these
3 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean: Peak value RMS value Instantaneous value Peak-to-peak value Both (A) and (C0
4 The length of rotating vector (on a certain scale) represents the: Peak value of alternating quantity RMS value of alternating quantity Instantaneous value of alternating quantity Either (B) or (C) Either (A) or (B)
5 A sinusoidally alternating voltage or current can be graphically represented by a: Vector Rotating vector Clockwise vector Anticlockwise voltage vector None of these
6 If 250V is the RMS value of alternative voltage, then its peak value Vowill be: 353.5V 250V 175V zero 400V
7 If we connect a A.C. volt meter to read A.C. voltage, It would read its: RMS value Instantaneous value Valued average over a cycle Zero Both (B) and (C)
8 The phase at the positive peak of an A.C. cycle is: 0<span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt; text-align: justify;">º</span><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p> 90<span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt; text-align: justify;">º</span><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p> 180<span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt; text-align: justify;">º</span><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p> 0 and<span style="font-size:12.0pt;line-height:107%; font-family:&quot;Plantagenet Cherokee&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-bidi-font-family:&quot;Times New Roman&quot;; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Ꮨ</span> <span style="font-size:12.0pt;line-height:107%; font-family:&quot;Plantagenet Cherokee&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-bidi-font-family:&quot;Times New Roman&quot;; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Ꮨ/2 and 3</span><span style="font-size:12.0pt;line-height:107%; font-family:&quot;Plantagenet Cherokee&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-bidi-font-family:&quot;Times New Roman&quot;; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Ꮨ/2</span>
9 The alternative voltage of current is actually measured by: Its RMS value Square root of its mean square value Instantaneous value Peak value Both (A) and (B)
10 The magnitude of alternative voltage V: Always increase Always decrease Remains constant Does not remain constant None of these
11 If we connected the ordinary DC ammeter to measure alternating current, it would measure its: Instantaneous value RMS value Value averaged over a cycle Either (B) or (C) Either (A) or (C)
12 The RMS value of alternating current is: 0.7 times at the peak value 0.5 times the peak value 0.7 times the Instantaneous value Equal to maximum voltage None of these
13 The Instantaneous value of alternative current maybe: The same as its RMS value Greater than its Rms value The same as its peak value Any of these None of these
14 Peak value of alternative current is:
 one of its Instantaneous value Equal to its RMS value The same as its peak-to-peak value Both (B) and (C) None of these
15 The sum of positive and negative peak values is called: Instantaneous value Peak value Rms valuie Peak-to peak-value None of these
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