Quiz

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Year 2025

November
Week # 2 Quiz 5

Q1. The size of jacobian matrix of a 13 bus power system with 5 voltage controlled buses and a slack bus is

Q2. A single line diagram of a power system is shown if Fig. The diagonal elements of the \(Z_{bus}\) matrix are



Q3. A given solar cell has the following specifications: Open-circuit voltage, \(V_{oc}\): 0.7 V, Short-circuit current, \(I_{sc}\): 3.5 A , Fill factor, FF: 0.6, Input power,\(P_{in}\) : 10 W, If the solar cell operates at maximum power point, calculate the efficiency.

Q4. While studying the performance of a short transmission line, only _____ of the line are taken into account.

Q5. The current drawn by the line due to corona losses is

Q6. In a bulk oil circuit breaker, the oil actually used for arc extinction is about

Q7. A string of eight suspension insulators is to be fitted with a grading ring as shown in Fig. If the pin to earth capacitances are all equal to \(C\), find the value of line to pin capacitance \(C_1\) that would give a uniform voltage distribution over the string.

Q8. In a three phase, 5 kV, 5 MVA system, what is the base impedance?

Q9. A short line with R/X ratio 1, the zero regulation is obtained when the power factor of the load is

Q10. The unit of transmission line constant ‘B’ is