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___________?

A. Uninterruptible power supplies
B. Induction heating system
C. Constant voltage and frequency power supplies
D. All of these

A. SIT is a high power, high frequency device
B. SIT is a high power, low frequency device
C. SIT is a high power, high voltage device
D. SIT is a low power, high frequency device

A. Motors
B. Switches, radio interferences
C. Computers, digital electronics
D. All of these

A. Square AC output voltage
B. Sine AC output voltage
C. Triangular AC output voltage
D. Trapezoidal AC output voltage

A.It is related to turn off process of the device.
B. It is related to conduction process of device.
C. It is related to turn on process of the device.
D. Both C and D.

A. gate signal is always present
B. gate signal must be removed
C. gate signal should present but can be removed
D. none of the above.