Power lab

The static V-I curve for the SCR is plotted for

• Ia (anode current) vs Ig (gate current), Va (anode – cathode voltage) as a parameter

• Ia vs Va with Ig as a parameter

• Va vs Ig with Ia as a parameter

• Ig vs Vg with Ia as a parameter

Among the following, the most suitable method to turn on the SCR device is the

• gate triggering method

• dv/dt triggering method

• forward voltage triggering method

• temperature triggering method

For the SCR to remain in the ON (conducting) state

• gate signal is continuously required

• no continuous gate signal is required

• no forward anode-cathode voltage is required

• negative gate signal is continuously required

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

In the reverse blocking mode the middle junction (J2) has the characteristics of that of a

• transistor

• capacitor

• inductor

• none of the mentioned

The arrow on the symbol of MOSFET indicates

• that it is a N-channel MOSFET

• the direction of electrons

• the direction of conventional current flow

• that it is a P-channel MOSFET

In the transfer characteristics of a MOSFET, the threshold voltage is the measure of the

• minimum voltage to induce a n-channel/p-channel for conduction

• minimum voltage till which temperature is constant

• minimum voltage to turn off the device

• none of the above mentioned is true

IGBT possess

• low input impedance

• high input impedance

• high on-state resistance

• second breakdown problems

The three terminals of the IGBT are

• base, emitter & collector

• gate, source & drain

• gate, emitter & collector

• base, source & drain

A triac is a …………. switch

• Bidirectional

• Unidirectional

• Mechanical

• Electromechanical