A rectifier with an external low pass filter is an example of:
A. Indirect switch matrix circuits
B. Direct switch matrix circuits
C. Embedded converters
D. All of these
What is the advantage of HRC fuses over Rewirable fuses:
A. High speed operation
B. High rupturing capacity
C. No ageing effect
D. All of the above
The power demand can be estimated approximately by:
A. Load survey method
B. Mathematical method
C. Statistical method
D. Economic parameters
Unipolar modulation is generally used in:
A. AC – AC converters
B. AC – DC converters
C. DC – AC converters
D. DC – DC converters
Maximum di / dt in a SCR is:
A. Directly proportional to Vm of supply voltage
B. Inversely proportional to Vm
C. Inversely proportional to L
D. Both A and C
By which one of the following we can measure the reliability of a string:
A. String efficient
B. Reliability factor
C. Factor of safety
D. Derating factor
Anode current in an SCR consists of:
A. holes only
B. electrons only
C. either electron or holes
D. Both electron and holes
To meet high current demand we use SCRs in:
A. series connection.
B. parallel connection.
C. anti parallel connection.
D. both B and C.
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
SCRs are used in series to meet:
A. high current demand
B. low voltage demand
C. low current demand
D. high voltage demand
Which following is a two terminal three layer device:
A. BJT
B. Power dioed
C. MOSFET
D. None of above
ON state voltage drop across SCR lie between the range:
A. 0 – 0.5 V.
B. 0.5 – 1 V.
C. 1 – 1.5 V.
D. 1.5 – 2 V.
