A dynamometer type wattmeter responds to the

The primary current in a current transformer is dictated by

A transfer instrument employed in the standardization of a polar type $$a.c$$ potentiometer is ______

A single-phase alternator has a synchronous reactance of $$2$$ $$ohms$$ and negligible resistance. If it supplies $$10$$ $$A$$ to a purely capacitive load at $$200V,$$ then generated $$e.m.f$$ will be ... $$V$$ and the regulation will be ...... $$\% $$