Power Electronics A step up chopper has input voltage 110 V and output voltage 150 V. The value of duty cycle is 0.32. 0.27. 0.45. 0.67. 0.32. 0.27. 0.45. 0.67. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics A thyristor string is made of a no. of SCR connected in series and parallel. The string have volume and current of 11 KV and 4 KA. The voltage and current rating of available SCRs are 1800 V and 1000 A. For a string efficiency of 90 % let the number of SCRs in series and parallel are a and b respectively. Then the value of a and b will be 5, 7. 4, 6. 7, 5. 6, 4. 5, 7. 4, 6. 7, 5. 6, 4. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Materials used in heat sink should have high thermal conductivity. high melting point. All of these. large surface area. high thermal conductivity. high melting point. All of these. large surface area. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics An SCR has half cycle surge current rating of 3000 A for 50 Hz supply. One cycle surge current will be 4242.64 A. 6000 A. 2121.32 A. 1500 A. 4242.64 A. 6000 A. 2121.32 A. 1500 A. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics If a latching current for the circuit shown in figure is 2 mA. Obtain the value of minimum width of the property turn ON the SCR? 3.2 µs 3 µs. 3.3 µs 3.1 µs 3.2 µs 3 µs. 3.3 µs 3.1 µs ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which statement is true for latching current ? Both C and D. It is related to conduction process of device. It is related to turn on process of the device. It is related to turn off process of the device. Both C and D. It is related to conduction process of device. It is related to turn on process of the device. It is related to turn off process of the device. ANSWER DOWNLOAD EXAMIANS APP
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