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? 480 Volts 120 Volts 60 Volts 30 Volts 480 Volts 120 Volts 60 Volts 30 Volts ANSWER EXPLANATION DOWNLOAD EXAMIANS APP For transformer, V2/V1 = N2/N1V2/120 = 50/200V2 = 30 V
DGVCL Exam Paper (12-06-2016) About how many times longer would a 10 watt light bulb be able to burn compared to a 100 watt bulb with the same energy? 10 times longer None of these Same time 100 times longer 10 times longer None of these Same time 100 times longer ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) A 100-watt light bulb turned on for 8 hours uses : 800 Wh None of these 8 kWh 0.8 kWh 800 Wh None of these 8 kWh 0.8 kWh ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In Solution 0.8 kWh and 800 Wh both options are given as answer as both are correct
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 secondary current Increase the primary current Have no effect on the secondary current Decrease the secondary current Increase the secondary current Increase the primary current ANSWER EXPLANATION DOWNLOAD EXAMIANS APP transformer ratio K : N₂/N₁=V₂/V₁=I₁/I₂
DGVCL Exam Paper (12-06-2016) In fuel cell the _____ energy is converted into electrical energy. Sound Mechanical Heat Chemical Sound Mechanical Heat Chemical ANSWER DOWNLOAD EXAMIANS APP
DGVCL Exam Paper (12-06-2016) The main advantage of AC over DC is: AC can be easily converted into DC by using a rectifier All of these Conversion flexibility from one voltage level to other AC is easy to maintain & can be easily distributed at long distances AC can be easily converted into DC by using a rectifier All of these Conversion flexibility from one voltage level to other AC is easy to maintain & can be easily distributed at long distances ANSWER DOWNLOAD EXAMIANS APP
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