Complete the blank: 1) In a dynamometer type wattmeter, to limit the current (I 2 ), a ــــــــــــــــــــــــــــ is connected in series with moving coil. 2) In bridges, under balanced condition...

Complete the blank:

1) In a dynamometer type wattmeter, to limit the current (I₂), a ــــــــــــــــــــــــــــ is connected in series with moving coil.

2) In bridges, under balanced condition ـــــــــــــــــــــــــــ current flows through the galvanometer(detector).

3) In single phase energy meter , Moving System consists of a _________________mounted on a  vertical spindle and free to rotate.

4) _________________ device may be used for extending the range of voltmeter .

5) ــــــــــــــــــــــــــــــــــ is the ratio between change in output and change in input.