Q. 31. A 4 kV, 110 Hz Schering bridge with a grounded detector as shown in fig. 4 has Cs-100 PF. In a test on an insulator, the balance was obtained with C4-0.2 µF, R4-2102, and R3-140 2. By removing the insulator from the measuring system, the balance will be reached at R3-700 £2 and C4-0.004 µF. Take into account the system stray capacitance and leakage and find the insulator parallel resistance Rp.: A. 306.62 MO B. 316.62 MD2 C, 326.62 M2 D. 336.62 MO

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please solve parts 31 and 32

Assuming a fixed distance between parallel plates with a uniform field, and assuming
unchanged Townsend's coefficients, the pressure is changed and the breakdown voltage is
measured with the following results:
apresure 180 r
the breakdown voltage is found to be 360V.
Answer Q29 & Q30
Q.29. Find the value of the pressure for minimum breakdown voltage according to Paschen's law.
C. 593.92 torr D. 553.92 tom
A. 527. 92 torr B. 509.92 torr
Q. 30. Find the value of the minimum breakdown voltage according to Paschen's law.
C. 377.41 V
D. 357.41 V
A. 337.41 V
B. 327.41 V
Q. 31. A 4 kV, 110 Hz Schering bridge with a grounded detector as shown in fig. 4 has C-100
PF. In a test on an insulator, the balance was obtained with C4-0.2 µF, R4-2102, and R3- 140
2. By removing the insulator from the measuring system, the balance will be reached at R3-700
2 and C4-0.004 µF. Take into account the system stray capacitance and leakage and find the
insulator parallel resistance Rp.:
A. 306.62 MO B. 316.62 MD2
C,326.62 MO
D. 336.62 MN
Q. 32. A generating voltmeter is used to measure a DC voltage. The value of the varying
capacitance is given by 14+11 sin cot pF. If the current generated is 4cos ut A, and if the speed
of the synchronous motor driving the generating voltmeter is 700 rpm, then the applied voltage is:
A. 6.201 kV B. 7.751 kV C. 4961 kV D. 3.969 kV
Transcribed Image Text:Assuming a fixed distance between parallel plates with a uniform field, and assuming unchanged Townsend's coefficients, the pressure is changed and the breakdown voltage is measured with the following results: apresure 180 r the breakdown voltage is found to be 360V. Answer Q29 & Q30 Q.29. Find the value of the pressure for minimum breakdown voltage according to Paschen's law. C. 593.92 torr D. 553.92 tom A. 527. 92 torr B. 509.92 torr Q. 30. Find the value of the minimum breakdown voltage according to Paschen's law. C. 377.41 V D. 357.41 V A. 337.41 V B. 327.41 V Q. 31. A 4 kV, 110 Hz Schering bridge with a grounded detector as shown in fig. 4 has C-100 PF. In a test on an insulator, the balance was obtained with C4-0.2 µF, R4-2102, and R3- 140 2. By removing the insulator from the measuring system, the balance will be reached at R3-700 2 and C4-0.004 µF. Take into account the system stray capacitance and leakage and find the insulator parallel resistance Rp.: A. 306.62 MO B. 316.62 MD2 C,326.62 MO D. 336.62 MN Q. 32. A generating voltmeter is used to measure a DC voltage. The value of the varying capacitance is given by 14+11 sin cot pF. If the current generated is 4cos ut A, and if the speed of the synchronous motor driving the generating voltmeter is 700 rpm, then the applied voltage is: A. 6.201 kV B. 7.751 kV C. 4961 kV D. 3.969 kV
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