DGVCL Exam Paper (12-06-2016) What will happen if the primary of a transformer is connected to DC supply? Transformer may start to smoke and burn Transformer will operate with high efficiency Transformer will operate with low efficiency No effect Transformer may start to smoke and burn Transformer will operate with high efficiency Transformer will operate with low efficiency No effect 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) With effect from _____ India has adopted a new legislation called the Electricity Act 2003. 3 June 2003 2 June 2003 None of these 2 May 2003 3 June 2003 2 June 2003 None of these 2 May 2003 ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) One kilowatt-hour is? 2.6 mega joules 3.6 mega joules None of these 1.6 mega joules 2.6 mega joules 3.6 mega joules None of these 1.6 mega joules ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) Increasing the number of turns of wire on the secondary of a transformer will Have no effect on the secondary current Decrease the secondary current Increase the primary current Increase the secondary current Have no effect on the secondary current Decrease the secondary current Increase the primary current Increase the secondary current ANSWER EXPLANATION DOWNLOAD EXAMIANS APP transformer ratio K : N₂/N₁=V₂/V₁=I₁/I₂
DGVCL Exam Paper (12-06-2016) Which of the following does not change in a transformer? All of these Frequency Current Voltage All of these Frequency Current Voltage ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In transformer voltage and current can be raised or lowered.Frequency remains samePower and Flux remains almost constant.
DGVCL Exam Paper (12-06-2016) A 17 inch personal computer uses approximately 150 watts in an hour. If you have same computer on for only 4 minutes (for checking e-mail) what would be the power consumption? 0.01 kW None of these 0.04 kW 0.1 kW 0.01 kW None of these 0.04 kW 0.1 kW ANSWER DOWNLOAD EXAMIANS APP
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