An SCR (Silicon Controlled Rectifier) acts like a switch when turned on. It can also be used as a rectifier.
BJT is nothing but the addition of two PN junction diodes. There are two types of BJT= P-N-P or N-P-N P-N N-P + or + N-P = P-N-P P-N =N-P-N SCR is a thyristor which is made adding two BJTs. Of course they are made of sillicon. Exempli gratia: P-N-P + + N-P-N = P-N-P-N comparison between scr bjt and mosfet Check the related link for further information.
probably the Seymour duncan cool rails for strat SCR-1
Zone plate acts like a converging lens because n, which refers to order or any integer can take a positive value. When n takes a positive value, the zone plate acts just like a converging lens.
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to make the revers biased p-n junction in SCR to be conducting.when we apply gate signal across gate and cathode it establish conducting part,thus the current from anode to cathode flow i.e main current.even after we remove the gate signal SCR in conducting mode because now this conducting path is maintain by main current i.e current from anode to cathode
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silicon controlled rectifier is a 3 terminal 4 layer device which has 2 consecutive P N junctions here the three terminals called anode, cathode and gate gate controls the conduction of the scr but diode just conducts in forward bias and blocks in reverse bias
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The turns ratio is the number of primary turns divided by the number of secondary turns. This is the same ratio as input current to output current. ie the turns ratio N = I1/I2
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A turns ratio of 2000 to 100 is a 20 to 1 reduction in voltage, so the secondary, if the primary is 220 V, must be 11 V.