DGVCL Exam Paper (12-06-2016) The following is correct : P = I²xR P = V²/R P = VxI All of these P = I²xR P = V²/R P = VxI All of these ANSWER EXPLANATION DOWNLOAD EXAMIANS APP True for DC Circuits.For single pahse ac P = V I CosØ
DGVCL Exam Paper (12-06-2016) Transformer core is laminated to _____ Reduce hysteresis loss Reduce all above losses Reduce eddy current losses Reduce copper losses Reduce hysteresis loss Reduce all above losses Reduce eddy current losses Reduce copper losses ANSWER EXPLANATION DOWNLOAD EXAMIANS APP To reduce eddy current loss laminations is done.To reduce hysteresis loss good magnetic material (whose specific hysterisis loss is low) is used.
DGVCL Exam Paper (12-06-2016) A certain transformer has 200 turns in the primary winding, 50 turns in the secondary winding and 120 volts applied to the primary. What is the voltage across the secondary? 60 Volts 30 Volts 120 Volts 480 Volts 60 Volts 30 Volts 120 Volts 480 Volts ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For transformer, V2/V1 = N2/N1V2/120 = 50/200V2 = 30 V
DGVCL Exam Paper (12-06-2016) The kVA rating of Three-phase transformer with Voltage = 200 V and Current = 100 A will be : 20 kVA 34.64 kVA None of these 75 kVA 20 kVA 34.64 kVA None of these 75 kVA ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For three phase,VA = √3 V IFor single phase, kVA = V I
DGVCL Exam Paper (12-06-2016) Capacitance is the ability of a body to store an _____ electrical charge All of these voltage electric current electrical charge All of these voltage electric current ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The acting contacts for a circuit breakers are made of : Stainless Steel Hard-pressed carbon Copper Tungsten alloy Porcelain Stainless Steel Hard-pressed carbon Copper Tungsten alloy Porcelain ANSWER DOWNLOAD EXAMIANS APP
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