GS2GS2

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Evaluator Code table for filling by examiners. Contains 10 questions with page numbers and maximum marks: Q1 (Pg 1, Marks blank), Q2 (Pg 3), Q3 (Pg 5), Q4 (Pg 7), Q5 (Pg 9), Q6 (Pg 11), Q7 (Pg 14), Q8 (Pg 17), Q9 (Pg 20), Q10 (Pg 23). Grand Total row at bottom for signature.

— ABHISHEK SINGH · AIR 1747

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ABHISHEK SINGH

AIR 17472024

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GS2GS2

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A Schering bridge, used to test a specimen, has thc following bridge arms: arm ab contains the unknown capacitance (C1) whose loss part is represented by a Series redistrict (P1), arm bc contains a 150 pF resistance (R), arm cd contains a variable capacitor (C) in parallel with a variable non-inductive resistance (R3) and arm da contains a standard capacitor (C) of 150 pF. The supply is connected between a and c and the detector is connected between b and d. The specimen is tested at a frequency of 50 Hz, it is having a thickness of 6-3 mm and it is tested between electrodes each having a dimension of 0.15 x 0.18 m. At balance, C4 = 0.375 uF and R4 = 423 ohm. Find the capacitance, dissipation factor and relative permittivity of the speciman. Given : Permittivily of free Space = 8.854 x 10-12 F/m.

2017