Snubber circuit is used with SCR_________________?

Related Mcqs:

1. 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.

2. Why resistor is used in Snubber circuit_________________ ?

   A. To minimize the loss
   B. To minimize the charging current
   C. To minimize the discharging current
   D. All of these

3. An RC snubber network used in BJT__________?

   A. Divert the collector current during turn – off
   B. Improves the reverse bias safe operating area
   C. Dissipates a fair amount of switching power
   D. All of these

4. Gate circuit or triggering circuit of a thyristor is

   A. lower power circuit.
   B. high power circuit.
   C. magnetic circuit.
   D. may be low power or high power circuit

5. Dynamic equalising circuit is useful____________?

   A. To limit di / dt of SCR
   B. To limit dV / dt of SCR
   C. For voltage equalisation
   D. Both B and C

6. For series connected SCR’s dynamic equalising circuit consists of___________?

   A. R and C in series but with diode across C
   B. R and C in series but with diode across R
   C. Series R and diode with C across R
   D. Series R and diode with C across R

7. Dynamic equalizing circuit is used for________________?

   A. equal division of voltage across each thyristor
   B. equal division of current through each thyristor in parallel
   C. equal division of voltage across each thyristor in parallel
   D. equal division of current through each thyristor in series

8. Any electrical signal present in a circuit other than the desired signal is known as______________?

   A. Noise
   B. Distortion
   C. Interference
   D. All of these

9. A crowbar is a circuit which is used to protect a_____________?

   A. voltage sensitive load from excessive dc power supply output voltages
   B. current sensitive load from excessive dc power supply output voltages
   C. voltage sensitive load from excessive ac power supply output voltages
   D. current sensitive load from excessive ac power supply output voltages

10. Transformer utilization factor is a measure of the merit of a rectifier circuit. It is the ratio of_______________?

    A. AC input power to the transformer volt – amp rating required by secondary
    B. AC input power to the transformer volt – amp rating required by primary
    C. DC output power to the transformer volt – amp rating required by secondary
    D. DC output power to the transformer volt – amp rating required by primary