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How many layers and junctions does an SCR have?

How many layers and junctions does an SCR have? Correct Answer Four layers and three junctions

An SCR has four layers and three junctions. The layers are the p-n-p-n layer and there are three p-n junctions. There are three terminals named as anode, cathode and the gate terminal. The other options mentioned above are incorrect.

Related Questions

Consider the following statements: 1. In a silicon controlled rectifier (SCR), if the cathode gate is reverse-biased, then the SCR cannot fire at all. 2. The turn-on time of an SCR increases with temperature. 3. After an SCR is turned on, it can be made to turn off again by reverse biasing the gate. 4. Gate recovery time is the minimum time that the anode voltage must be maintained below holding voltage VH to turn off the SCR. Which of these statements are correct?
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A train travels at a speed of 66 km/h and halts at five junctions for a certain time. It covers a distance of 1485 km in one day. For how long (in minutes) does the train stop at each junction, if it halts for the same period of time at all the junctions?
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