The instananeous voltages at three terminals marked X,Y and Z are given by
v
$V_Y=V_0\sin \left(\omega t+\frac{2\pi }{3}\right)\text{and}{V}_Z=V_0\sin \left(\omega t+\frac{4\pi }{3}\right).$
An ideal volmeter is configured to read rms value of the potential difference between its terminal. It is connected between points X and Y and then between Y and Z. The reading(s) of the voltmeter will be

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