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gaurav95:
Can somebody help me in electronics I dont understand anything?esp.transistors which current is amplified why????What is diode ,What is Half-wave/fullwave rectification,What is time base in CRO.and thermistors also.......thx

Saladin:
Transistors

A diode is a device that turns AC current into DC current.

A half wave rectifier will block off alternating current:



A full wave will make that half into the same direction:



For CRO, this is a nice site:
CRO AND TIME BASE

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