The man made noise sources is / are_____________?

Related Mcqs:

1. Advantages of Cuk converter is / are_____________?

   A. Large number of reactive component
   B. Low stress on switch
   C. Low stress on capacitor
   D. None of these

2. A PNPN device having two gates is ___________?

   A. Diac
   B. Triac
   C. SUS
   D. BCS

3. The function of snubber circuit connected across the SCR is to___________?

   A. Suppress dV / dt.
   B. Increase dV / dt.
   C. Decrease dV / dt.
   D. Decrease di / dt.

4. Leakage current flows through the thyristor in_________?

   A. forward blocking mode
   B. reverse blocking mode
   C. both forward and reverse blocking mode
   D. forward conduction mode

5. Materials used in heat sink should have_____________?

   A. high thermal conductivity
   B. large surface area
   C. high melting point
   D. All of these

6. 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. 130 μs
   B. 135 μs
   C. 140 μs
   D. 145 μs

7. In ac – dc conversion, when the switch is closed then the sum of voltages around the loop is____________?

   A. Zero
   B. Non zero
   C. Equal to the sum of voltage when switch is open
   D. Twice of the voltage when switch is open

8. Between the incoming and outgoing devices in voltage commutation

   A. Large overlapping takes place
   B. Small overlapping operation
   C. No overlapping operation
   D. None of these

9. The maximum firing angle in the half wave controlled regulator is_____________?

   A. 180 degree
   B. 190 degree
   C. 200 degree
   D. 210 degree

10. The phase angle of gate signal in TRIAC can be shifted by using_____________?

    A. A capacitor
    B. A variable resistor
    C. An inductor
    D. Only (a) and (b)