| 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: "Times New Roman", 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:"Times New Roman","serif""><o:p></o:p></span></p><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt;
line-height:107%;font-family:"Times New Roman","serif""><o:p></o:p></span></p>
90<span style="font-family: "Times New Roman", 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:"Times New Roman","serif""><o:p></o:p></span></p>
180<span style="font-family: "Times New Roman", 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:"Times New Roman","serif""><o:p></o:p></span></p>
0 and<span style="font-size:12.0pt;line-height:107%;
font-family:"Plantagenet Cherokee","serif";mso-fareast-font-family:Calibri;
mso-fareast-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";
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:"Plantagenet Cherokee","serif";mso-fareast-font-family:Calibri;
mso-fareast-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";
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:"Plantagenet Cherokee","serif";mso-fareast-font-family:Calibri;
mso-fareast-theme-font:minor-latin;mso-bidi-font-family:"Times New Roman";
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
|
| 16 |
The highest value reached by the voltage or current: |
In quarter cycle is called Instantaneous value
In half cycle is called peak-to-peak value
In one cycle is called peak value
In half cycle is called Instantaneous value
None of these
|
| 17 |
The entire wave form of sinusoidal voltage is actually a set of all the: |
Positive maximum value + V<sub>o</sub>and negative maximum value -V<sub>o</sub>
Posiotive maximum value +V<sub>o </sub>and zero
Zero and negative maximum value -V<sub>o</sub>
Any of these
None of these
|
| 18 |
The waveform of alternating voltage is a: |
Square
Rectangular
Saw-tooth
Sinusoidal
None of these
|
| 19 |
The wave form of alternating voltage is the graph between: |
Voltage across X-axis and time across y-axis
Current and time
Voltage along y-axis and time along x-axis
Voltage and current
Either (B) or (D)
|
| 20 |
The most common source of alternating voltage is: |
Motor
Transformer
AC genrator
Both (A) and (C)
Both (A) and (B)
|
| 21 |
The time interval during which the Voltage source changes its polarity once is known as: |
Time period T
Half the time period
Quarter the time period
Two third of the time period
None of these
|
| 22 |
Nowadays, Most of the electric energy is produced by the A.C. generators using: |
Hydal water
Geothermal energy
Solar energy
Biomass
Both (B) and (D)
|
| 23 |
Alternating current is produced by a voltage source which polarity: |
Remains the same
Reverse after period T
Keeps on reversing with time
Reverse after every time interval T/2
Both (C) and (D)
|
| 24 |
Alternating current can be transmitted: |
To long distance
At very high cost
At very low cost
Both (A) and (C)
Both (A) and (B)
|
| 25 |
A P-N juction or semiconductor diode cannot be used as |
A rectifier
Detector
Oscillator
An amplifier
|
| 26 |
In describing functions of digital systems, a closed switch will be shown as |
0
1
low
any one of these
|
| 27 |
Mathematical manipulation of the two quantized states can be best carried if they are represented by |
high - low
yes - no
on - off
0 - 1
|
| 28 |
A digital system deals with quantities or variables which have |
only one state
only two discrete states
three discrete states
four discrete states
|
| 29 |
Most OP-AMP operates with |
<u>+</u> 6 V supply
<u>+</u> 10 V supply
<u>+</u> 12 V supply
<u>+</u> 24 V supply
|
| 30 |
The R1= infinity and R2= 0, then the gain of non-inverting amplifier is |
zero
infinity
one
any one of these
|
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