Dynamometer Wattmeter Construction
A dynamometer type wattmeter is characterized by its use of two specific types of coils:
- A fixed current coil: This coil has low resistance and is connected in series with the load to measure the current flowing through it.
- A movable potential coil: This coil has high resistance and is connected in parallel across the load to measure the voltage across it.
The interaction between the magnetic fields generated by these two coils allows for the measurement of electrical power. The torque produced is proportional to the product of the voltage across and the current through the load, which represents power.
Therefore, the defining components of a dynamometer wattmeter are its potential and current coils.
Similar Questions
Which of the following instruments is used to test the earth resistance of an earthing system?
- What does an optical pyrometer measure?
- The length of a sine bar is the distance between _______.
- What is the use of hermaphrodite caliper?
- The part of the universal surface gauge which helps to draw a parallel line along a datum edge is the _______.
- The number of threads per inch can be checked with a _______.
- It works on the principle of rake & pinion.
- ________ is NOT a part of a combination set.
- Which gauge is used for measuring diameter of a cylinder bore?
- Which of the following instrument is used for measuring higher temperatures in a furnace?
Important Questions from Measuring Instruments
Microscope is used for the study of which of the following?
What does a Vernier Caliper measure?
Atmospheric humidity is measured by -
'Anemometer' is an instrument used for measuring the
Instrument used to observe changes in the solar system is :
