MCQs

Using gate terminal the SCR can: Turned off only Turned on only Both of these None of these Correct answer: 2. Turned on only

Usually the SCS is available in power ratings that are _________ those of the SCR: Higher than Lower than Same as Any of above Correct answer: 2. Lower than

Anode-to-gate voltage in SCR can be used to: Turn on the device Turn off the device Both of these None of these Correct answer: 3. Both of these

SCS can be turned on by using which type of pulse on the anode gate: Negative pulse Positive pulse Any of these SCR is only switched on by applying negative pulse on cathode Correct answer: 1. Negative pulse

Which one of the following is practical application of UJT: Sawtooth generators Timing circuits Nonsinusoidal oscillators Phase control All of these Correct answer: 5. All of these

Which of the following belongs to Thyristors: SCRs LASCRs Diac Triac All of these Correct answer: 5. All of these

In the forward-blocking region, the SCR is: Reverse-biased In the on state In the off state At the point of breakdown Correct answer: 3. In the off state

The thyristor with two gate terminals: SCRs SCS Diac Triac Correct answer: 2. SCS

Light acts as the trigger source in which thyristor: SCRs LASCRs Diac Triac None of these Correct answer: 2. LASCRs Explanation: Light acts as the trigger source in light-activated SCRs (LASCRs)

Three terminals on SCR are named as: Anode, cathode, and base Anode, cathode, and gate Anode, cathode, and drain Emitter, collector and base Correct answer: 2. Anode, cathode, and gate