A triac is a -

• terminal bidirectional switch

• 3 terminal bilateral switch

• 2 terminal switch

• 2 terminal bilateral switch

During forward blocking state, a thyristor is associated with

• During forward blocking state, a thyristor is associated with -

• During forward blocking state, a thyristor is associated with -

• During forward blocking state, a thyristor is associated with -

• During forward blocking state, a thyristor is associated with -

A diac has ______________ pn junctions.

• One

• Two

• Three

• Four

TRIAC is a

• Two thyristors connected in series mode

• Two thyristors connected in parallel mode

• Two thyristors connected in anti parallel mode

• Two transistors connected in anti parallel mode

A thyristor is basically

• A set of SCRs

• PNPN device

• A set of SCR, diac and a triac

• None of above

A power transistor is a

• three layer, three junction device

• three layer, two junction device

• Two layer, one junction device

• our layer, three junction device

In the SCR structure the gate terminal is located

• near the anode terminal

• near the cathode terminal

• in between the anode & cathode terminal

• none of the mentioned

The value of anode current required to maintain the conduction of an SCR even though the gate signal is removed is called as the

• holding current

• latching current

• switching current

• peak anode current

The class A commutation or load commutation is possible in case

• dc circuits only

• ac circuits only

• both DC and AC circuits

• none of the above mentioned

In an IGBT, during the turn-on time

• Vge decreases

• Ic decreases

• Vce decreases

• none of the mentioned