Power Electronics In reverse blocking mode of a thyristor junction J3 is in forward bias and J1, J2 in reverse bias. junction J1, J3 is in reverse bias and J2 is in forward bias. junction J2 is in reverse bias and J1, J3 is in forward bias. junction J1 and J2 is in forward bias and J3 is in reverse bias. junction J3 is in forward bias and J1, J2 in reverse bias. junction J1, J3 is in reverse bias and J2 is in forward bias. junction J2 is in reverse bias and J1, J3 is in forward bias. junction J1 and J2 is in forward bias and J3 is in reverse bias. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics After peak point, the UJT operates in the ___________ region. Saturation Cut-off None of these Negative resistance Saturation Cut-off None of these Negative resistance ANSWER DOWNLOAD EXAMIANS APP
Power Electronics Which semiconductor device acts like a diode and two transistor? Diac. Triac. UJT. SCR. Diac. Triac. UJT. SCR. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The UJT may be used as ___________. Am amplifier A rectifier None of these A sawtooth generator Am amplifier A rectifier None of these A sawtooth generator ANSWER DOWNLOAD EXAMIANS APP
Power Electronics The reverse recovery time of diode is trr = 3 μs and the rate off all of the diode current is di/dt = 30 A/μs. The storage charge current QRR is 140 μs. 145 μs. 130 μs. 135 μs. 140 μs. 145 μs. 130 μs. 135 μs. ANSWER DOWNLOAD EXAMIANS APP
Power Electronics When a large surge current of very short duration flows through a thyristor then which one of the following device will operate to protect the thyristor ? Snubber circuit. CB. Voltage clamping device. Fast acting current limiting device (FACL fuse). Snubber circuit. CB. Voltage clamping device. Fast acting current limiting device (FACL fuse). ANSWER DOWNLOAD EXAMIANS APP
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