DGVCL Exam Paper (12-06-2016) What will happen if the primary of a transformer is connected to DC supply? Transformer will operate with low efficiency No effect Transformer will operate with high efficiency Transformer may start to smoke and burn Transformer will operate with low efficiency No effect Transformer will operate with high efficiency Transformer may start to smoke and burn ANSWER EXPLANATION DOWNLOAD EXAMIANS APP transformer works on principle of faraday's law of electromagnetic induction. So if D.C supply use, no indction are produced and due to this E.M.F not induced in winding and transfer of electrical energy is not possible.
DGVCL Exam Paper (12-06-2016) The main objectives in framing tariff are: The tariff must be equitable amongst different consumers Tariffs can be modified from time to time All of these The consumers must readily understand the tariffs The tariff must be equitable amongst different consumers Tariffs can be modified from time to time All of these The consumers must readily understand the tariffs ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The consumer of electricity could be: Industrial and Commercial All of these Agricultural Domestic Industrial and Commercial All of these Agricultural Domestic ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The following is correct : P = VxI P = I²xR All of these P = V²/R P = VxI P = I²xR All of these P = V²/R ANSWER EXPLANATION DOWNLOAD EXAMIANS APP True for DC Circuits.For single pahse ac P = V I CosØ
DGVCL Exam Paper (12-06-2016) Wave trap is used to trap waves of: None of these Power frequencies All of these Higher frequencies entering generator or transformer units None of these Power frequencies All of these Higher frequencies entering generator or transformer units ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Which of the following does not change in a transformer? Current Voltage All of these Frequency Current Voltage All of these Frequency ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In transformer voltage and current can be raised or lowered.Frequency remains samePower and Flux remains almost constant.
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