If 110V supply is connected across a1 and a4 instead of a1 and a2, what will be the voltage across b1 and b4? 110V 220V 55V With the connections as autotransformer(i.e. a2 and a3 shorted as well as a4 and b4 shorted), if the 110V supply is across a1 and a4, what will the voltage measured across a3b1 be? 110V 165V 220V