What is the full form of the acronym 'AIDS' in diseases?

In a synchronous motor with field under excited, the power factor will be

For synchronous motor,
Under excitation - Lagging power factor
Over excitation - Leading power factor

For synchronous generator
Under excitation - Leading power factor
Over excitation - lagging power factor

Fill in the blanks with suitable Preposition from the given alternatives.
England skipper Joe Root is excited to bat ____ number three in the Ashes cricket series

The expression for voltage regulation of a short transmission line for leading power factor is given by: ____, where, 'I' is the line current, 'V_r' is the receiving end voltage, 'R' is the line resitance and 'X' is the line reactance.

For lagging power factor = (IR*cosφ + IXsinφ)/V_r
For leading power factor = (IR*cosφ - IXsinφ)/V_r
Zero voltage regulation occurs on leading power factor only.

The magnitude of the generator earth-fault current is limited by

The neutral point of a generator is usually earthed to facilitate protection of the stator winding and associated system.
Earthing also prevents damaging transient overvoltages in the event of an arcing earth fault or ferro resonance.
For HV generators, impedance is usually inserted in the stator earthing connection to limit the magnitude of earth fault current.

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