A Triac has three terminals viz ___________?
(A) Drain, source, gate
(B) Two main terminal and a gate terminal
(C) Cathode, anode, gate
(D) None of the above
A thyristor is basically________?
(A) PNPN device
(B) A combination of diac and triac
(C) A set of SCRs
(D) A set if SCR,diac and triac
A silicon controlled racitifier (SCR) is a ____________?
(A) Unijunction device
(B) Device with three junction
(C) Device with four junction
(D) None of the above
A thyristor equivalent of a thyratron tube is a _________?
(A) Diac
(B) Triac
(C) Silicon controlled-rectifier SCR
(D) None of above
A Triac is a ______________?
(A) 2 terminal switch
(B) 2 terminal bilateral switch
(C) 3 terminal bilateral switch
(D) 3 terminal bidirectional switch
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.
For an SCR gate – cathode characteristic is a straight line of 130. For triggered source volume of 15 V and allowable gate power dissipation of 0.5 W compute the gate source resistance_____?
(A) 111.9 Ω.
(B) 11.19 Ω.
(C) 108 Ω.
(D) 115 Ω
In forward blocking mode of a thyristor________?
(A) junction J2 is in reverse bias and J1, J3 is in forward bias.
(B) junction J3 is in forward bias and J1, J2 is in reverse bias.
(C) Junction J1, J3 is in reverse bias and J2 is in forward bias.
(D) Junction J1 and J2 is in forward bias and J3 is in reverse bias.