Answer Posted / rohit kumar soni

VARIAC, AUTO TRANSFORMER, DIMMERSTATE ALL DEVICE WHICH CAN
BE USED TO GET VARIABLE AC VOLTAGE AT THE CONDITION OF NO
CHANGE IN INPUT AC VOLTAGE.THIS TYPE OF TRANSFORMER IS
CALLED AUTO TRANSFORMER. IN THIS TRANFORMER THERE IS A COIL
WINDING CONNECTED TO AC INPUT AND ONE OUT PUT CONNECTION IS
COMMAN LINE AND ANOTHER OUTPUT LINE MOVES WITH THE HELP OF
A CORBAN SLIDER ON THE AC INPUT COIL AS SLIDER MOVES WE GET
VARIABLE AC VOLTAGE .

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