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Can we a transformer be used to step up ...

Can we a transformer be used to step up or step down a D.C. voltage? Explain.

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What is the principle of the working of a transformer ?
What is the basic difference between A. C voltage and D.C.voltage ?
How do the induced emf develop in the secondary coil ?
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PEARSON IIT JEE FOUNDATION-ELECTROMAGNETISM-CONCEPT APPLICATION ( LEVEL 2)
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  15. How do you locate a current-carrying wire concealed in a wall?

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  18. To detect electric current using a galvanoscope, the plane of the coi...

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