A. Collector, emitter and gate
B. Drain, source and gate
C. Drain, source and base
D. Collector, emitter and base
A. 5, 7
B. 4, 6
C. 7, 5
D. 6, 4
A. Lighting and heating control
B. On – line transformer tap changing
C. Soft starting
D. All of these
A. charge carriers of J2 junction recombined
B. charge carriers of J2 junction is swept out
C. charge carrier of J1 junction removed
D. charge carriers of J3 junction is removed
A. Only amplitude of voltage is controllable
B. Only phase is controllable
C. Both amplitude and phase is controllable
D. Amplitude, phase and frequency of voltages should always be controllable
A. Single phase
B. 3 phase
C. Poly phase
D. Only (b) and (c)
A. PNPN device
B. A combination of diac and triac
C. A set of SCRs
D. A set if SCR,diac and triac