GETCO Exam Paper (22-07-2015)
The Y bus matrix is a sparse matrix because …

no of lines are less
bus incidence matrix is a sparse matrix
Y primitive is a sparse matrix
lines are connected to less no. of buses

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GETCO Exam Paper (22-07-2015)
Hopkinson's test is the test to be carried out on

two identical induction motors
two identical DC motors
induction motor with synchronous motor
induction motor with any DC motor

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