The part of the transistor which is heavily doped to produce large number of majority carriers is

If ne and nh are the number of electrons and holes in a semiconductor heavily doped with phosphorus, then

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In a pn junction diode, if p region is heavily doped than n region, then the depletion layer is (1) greater in p region (2) greater in n region (3) equal in both region (4) no depletion layer is formed in this case

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A common transistor radio set requires 12V (D.C.) for its operation. The D.C. source is constructed by using a transformer and a rectifier circuit, which are operated at 220 V (A.C.) on standard domestic A.C. supply. The number of turns of secondary coil are 24, then the number of turns of primary are ......