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IEC stands for International Electrotechnical Commission.
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Express the following functions in cosine form

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Form factor is equal to rms value divided by average value ... Peak factor is equal to Max value divided by rms value.

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Which of the following waveforms has the lowest form factor? A) Sine wave B) Square wave C) Sawtooth wave D) Triangle wave

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Which of the following waveforms has the lowest form factor? A) Sine wave B) Square wave C) Sawtooth wave D) Triangle wave

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Form factor for a sine wave is?

Answer :

Form factor of sine wave is the ratio of RMS value and average value. Kf= RMS value/ Average value RMS value = 0.707 Im Average value = 0.637 Im Kf = 0.707 / 0.637 = 1.11

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The form factor is the ratio of r.m.s. value to average value.

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Evaluate the following quantities and express your results in polar form

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Calculate these complex numbers and express your results in rectangular form

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1. In positive half cycle (0 to Π): The end A of the secondary winding becomes positive and end B negative. This makes diode D1 and D4 forward biased while diode D2 and D3 are reverse biased. These two diodes will ... D2 and D3 when it is conducting is as follows.  B - D2 - RL - D3 - A 

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A transformer operates 24 hours day at full -load. It's full -load efficiency is :  (A) equal all day efficiency (B) more than all -day efficiency (C) less than all -day efficiency (D) equal to maximum efficiency

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A transformer operates 24 hours day at full -load. It's full -load efficiency is : equal all day efficiency 

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Circuit Diagram: Waveforms:

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Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved. 

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Half Bridge Configuration: Full Bridge Configuration: 

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Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.

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A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is

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A 40 kVA transformer has a core loss of 400 W and a full load copper loss of 800 W. The proportion of full load at maximum efficiency is 0.707

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A four -quadrant operation requires two full converters connected in  (1) Series (3) Back to back (2) Parallel (4) Series Cascade

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A four-quadrant operation requires two full converters connected in Parallel 

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The ratio of maximum displacement deviation to full scale deviation of the instrument is called linearity.

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In over compounded generator, full load terminal voltage is more than no load terminal voltage.

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Power factor of semiconverter is better than full converter

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Three phase full wave controller: Three phase full wave controller is also called as the three-phase bidirectional controller. Let the load is star connected so at each phase there are antiparallel connected SCRs. ... conduct at the same time and the third phase will be open.

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Full bridge converter: Full bridge converter provides isolation between input and output. Full bridge converter is used for step up or step down the input voltage. Full bridge converter consists of four power semiconductor ... Require filter on both input and output.

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single phase full converter

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single phase full converter

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(D) Indian National Trust for Art and Cultural Heritage

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Severe Acute Respiratory Syndrome

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What will be the efficiency when the transformer operates at unity power factor and 60% of full load 96.5%

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Full wave rectified both time of positive and negative half cycle of ac.for thaat purpose two diodes are use.but in two diode case we have to use  centre trap transformer.to overcome on this disadvantage we use bridge rectifire having four diodes

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C) A meeting conference for discussion of a topic especially one in which the participants form an audience and make presentations.

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(C) Contradictory

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(C) A personal or corporate website in the form of an online journal

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