Question

Difference between induction type and dynamometer type wattmeter

Answer 1

Explanation:

Dynamometer Type Wattmeters

Induction Type Wattmeters

1.

The instrument can be used on both dc and ac systems.

The instrument cannot be used on dc system.

2.

The instrument can have high degree of accuracy.If carefully designed.

The instrument is less accurate. It is accurate only at stated frequency and temperature

3.

Power consumption is comparatively low.

Power consumption is comparatively higher

4.

Weight of moving system is comparatively low.

Weight of moving system is comparatively higher

5.

The instrument has uniform scale.

The instrument has uniform and long scale

6.

The instrument has comparatively weaker working torque.

The instrument has comparatively stronger working torque.