With the help of suitable circuit diagram and related equations, explain the principle of measurement of the unknown parameters of a low-impedance coil using a Q meter in series connection mode.

2Medium10 marks

What is the format of the control word of 8255 programmable peripheral interface? Explain the significance of each bit of the control word.

3Medium10 marks

One conductor of a three-phase line is open. The current flowing to the Delta-connected load through line a is 10 A. With the current in line a as a reference and assuming that line c is open, find the symmetrical components of the line currents.

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