________ एक ऐसा उपकरण है जो निम्न वोल्टेज प्रत्यावर्ती धारा को उच्च वोल्टेज प्रत्यावर्ती धारा में बदलता है।

A step-down transformer connected to an AC mains supply of 220 V operates an 11 V, 44 W lamp. Ignoring power losses, what is the current in the primary circuit?

A transformer has 200 turns in its primary winding and 1000 turns in its secondary winding. What type of transformer is this?