Is energy produced when a transformer steps up the voltage?

A transformer steps up or steps down

A transformer steps up or asteps down

A step up transformer is used to

A step up transformer is used to

Why cannot a transformer be used to step up d.c. voltage ?

Mention the principle behind the working of a transformer. Can a transformer used to step up a d.c. voltage ?

Step-up transformers are used for

(i) with the help of a labelled diagram, describe briefly the underlying principle and working of a stepup transformer. (ii) Write any two sources of energy loss in a transformer. (iii) A step-up transformed converts a low input voltage into a high output voltage. Does it violate law of conservation of energy ? Explain.

Assertion : Step-down transformer can also be used as step-up transformer. Reason: Ratio of voltage across primary and secondary coils is the same as ratio of respective number of turns.