In a low power factor wattmeter the compensating coil is connected
A. in series with current coil
B. in parallel with current coil
C. in series with pressure coil
D. in parallel with pressure coil
Answer: Option C
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Comments (1)
D.C. machines designed with a large value of air gap length have
A. worst, ventilation
B. poor ventilation
C. better ventilation
D. none of the above
_________ electromagnets generally function as holding magnets.
A. Tractive
B. Portative
C. Either of the above
D. None of the above
By which of the following methods motor rating for variable load drives can be determined ?
A. Method of average losses
B. Equivalent current method
C. Equivalent torque method
D. Equivalent power method
E. All of the above
In direct cooled system using hydrogen both stator and rotor conductors are made
A. solid
B. hollow
C. perforated
D. any ofthe above

To compensate for the power loss in the pressure coil,compensating coil with an equal number of turns of the current coil is connected in series opposition to the potential coil or pressure coil. Compensating coil requires only for LC connection not for MC connection