List of top Electronics and Communication Engineering Questions on Y-delta transformation asked in AP PGECET

If a Delta circuit has branches \(R_{ab} = 10\ \Omega\), \(R_{bc} = 20\ \Omega\), and \(R_{ca} = 30\ \Omega\), what is the equivalent Wye resistor \(R_a\) connected to node?

Identify the Y equivalent of a network of the circuit shown in Figure below.