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With the anode positive with respect to the cathode & the gate circuit open, the SCR is said to be in the
c Explanation: The SCR is in the forward blocking mode with its top and bottom junctions forward biased and the middle junction reversed biased.
c
Explanation: The SCR is in the forward blocking mode with its top and bottom junctions forward biased and the middle junction reversed biased.
See lessFor an SCR in the reverse blocking mode, (practically)
c Explanation: In the reverse blocking mode, the gate current is zero & a reverse voltage is applied at the cathode-anode.
c
Explanation: In the reverse blocking mode, the gate current is zero & a reverse voltage is applied at the cathode-anode.
See lessIf the cathode of an SCR is made positive with respect to the anode & no gate current is applied then
c Explanation: The device is in the reverse blocking state (3rd quadrant) & only the middle junction is forward biased whereas other two are reversed biased.
c
Explanation: The device is in the reverse blocking state (3rd quadrant) & only the middle junction is forward biased whereas other two are reversed biased.
See lessThe static V-I curve for the SCR is plotted for
b Explanation: The curve is plotted for Ia vs Va for different values of gate current Ig.
b
Explanation: The curve is plotted for Ia vs Va for different values of gate current Ig.
See lessIn the SCR structure the gate terminal is located
b Explanation: The gate is located near the cathode, because it allows fast turning on of the device when the gate signal is applied by forward basing the second junction.
b
Explanation: The gate is located near the cathode, because it allows fast turning on of the device when the gate signal is applied by forward basing the second junction.
See lessWhich terminal does not belong to the SCR?
c Explanation: The SCR is having three terminals viz. anode, cathode and the gate.
c
Explanation: The SCR is having three terminals viz. anode, cathode and the gate.
See lessFor MOSFET’s SOA, as the pulse width goes on increasing, the maximum voltage rating ____ & current rating ____
c Explanation: Refer MOSFET’s SOA.
c
Explanation: Refer MOSFET’s SOA.
See lessThe SOA for an IGBT is plotted for
d Explanation: It is a plot of collector current vs collector to emitter voltage.
d
Explanation: It is a plot of collector current vs collector to emitter voltage.
See lessThe SOA for a MOSFET is plotted for
a Explanation: It is a plot of drain current vs drain to source voltage.
a
Explanation: It is a plot of drain current vs drain to source voltage.
See lessFor a BJT, find the maximum power dissipation when the device is safely operated at Vce = 90V and Ic = 0.5A
c Explanation: P=90*0.5=45Watts.
c
Explanation: P=90*0.5=45Watts.
See less