Which of the following method is used for the measurement of Medium Resistance? a) Kelvin’s double bridge method b) Carey-Foster bridge method c) Anderson Bridge d) Direct-Deflection method
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Which of the following method is used for the measurement of Medium Resistance?
a) Kelvin’s double bridge method
b) Carey-Foster bridge method
c) Anderson Bridge
d) Direct-Deflection method
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- Predict value portion, using source voltage of 3.05 and R1 = 49 ohms and R2 = 99.5 ohms “Using Kirchhoff’s parallel circuit law”The mutual inductance coupling coefficient standard unit is .. * Ohm Henery O Unit-less MhoA. Discuss the importance of power electronics interfaces in microgrid installations B. With the aid of diagram describe DC microgrid C. With the aid of diagram describe AC microgrid
- Q2. A symmetrical n-network has a resistance of 7502 in the series arm and 2502 at each shunt arm. a) Calculate the open and short circuit impedances. b) Calculate the characteristic impedance. c) Calculate the propagation constant. d) Find its equivalent T-network.Which of the following statements is/are true? A In purely resistive circuit, the current lags voltage. (B In purely capacitive circuit, the voltage lags current. In purely resistive circuit, the current is in phase with voltage. D In purely inductive circuit, the current leads voltage.Combination circuit what is PT? RT? IT? Voltage Across each load?
- In an outdoor substation the three bus-bar conductors are supported by units of post type insulators. Each unit consists of a stack of 3 pin type insulators fixed one on the top of the other. The voltage across the lowest insulator is 15kV and that across the next unit is 12kV. Estimate: ratio of mutual to self-capacitance i. the bus-bar voltage of the substation. Efficiency across the string of insulators ii. iii.Which of the following statements is/are true? (A In purely inductive circuit, the current leads voltage. (B) In purely resistive circuit, the current lags voltage. C In purely resistive circuit, the current is in phase with voltage. D In purely capacitive circuit, the voltage lags current.i) Calculate V1 and V2 for the voltage across the string insulator having phase voltage of 33kV for transmission line using details tabulated in the Table 3(a). Table 3(a) Type of Insulator Shunt Capacitance between each unit 0.1 C String to junction Self -Capacitance of each insulator ii) With the help of a suitable schematic diagram and necessary theoretical explanation, illustrate how to improve the efficiency of the suspension insulator.
- a) Explain the construction of LVDT. Identify some suitable examples according to their applications.b) Discuss contacting and non-contacting tachometers.Q-3 A Cockeroft-Walton type voltage multiplier has ten stages with capacitances, all equal to 0.1 µF. The supply transformer secondary voltage is 100 kV at a frequency of 60 Hz. If the load current to be supplied is 5 mA, find (a) the percentage ripple, (b) the regulation, and (c) the optimum number of stages for minimum regulation or voltage drop.Consider a 3-phase, 50 HZ, 11 KV distribution system. Each of conductors is suspended by an insulator string having two identical porcelain insulators. The self-capacitance of the insulator is 5 times the shunt capacitance between link and ground. Find the voltages across two insulators.