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Voltage and Current

Q1:

A secondary cell generates dc via chemical activity; a primary cell generates dc:

A electrically

B thermally

C optically

D chemically

ANS:D - chemically

Transformer is a device which is used to step up and step down the voltage.

Rectifiers are used to convert AC to DC where.

Thyristors are used to convert dc to ac where in big industries.

IGBT are used to convert DC to AC here we can use frequency up to 1000 HZ.



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