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Which of the following principles is utilised in an electrodynamometer type instrument?
- a)Magnitude effect
- b)Force between two permanent magnets
- c)Force between two current-carrying coils
- d)Force between a permanent magnet and a current-carrying coil
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
Which of the following principles is utilised in an electrodynamometer...
Electrodynamometer type instrument utilized the principle of Electro-dynamic Effect or force between two current-carrying coils.
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Which of the following principles is utilised in an electrodynamometer...
The Principle of Electrodynamometer Instruments
The electrodynamometer is an electromechanical device primarily used for measuring electrical current or voltage. Its operation is based on a fundamental electromagnetic principle.
Key Principles
- Force Between Two Current-Carrying Coils:
- The electrodynamometer utilizes the interaction between two current-carrying coils.
- When electric current flows through these coils, they create magnetic fields.
- The interaction of these fields results in a mechanical force.
- Working Mechanism:
- One coil, known as the fixed coil, is stationary and is often connected to the power supply.
- The other coil, called the moving coil, is free to rotate within the magnetic field produced by the fixed coil.
- As the current flows through both coils, the moving coil experiences a torque due to the magnetic forces acting on it.
- Measurement Feature:
- The degree of rotation of the moving coil is proportional to the strength of the current flowing through the coils.
- This rotation is translated into a readable value, often through a calibrated scale.
Applications
- Versatile Use:
- Electrodynamometers are widely used in laboratories for precise measurements of electrical quantities.
- They can measure both alternating current (AC) and direct current (DC) effectively.
In conclusion, the electrodynamometer leverages the force between two current-carrying coils to provide accurate measurements, making it an essential instrument in electrical engineering.
The electrodynamometer is an electromechanical device primarily used for measuring electrical current or voltage. Its operation is based on a fundamental electromagnetic principle.
Key Principles
- Force Between Two Current-Carrying Coils:
- The electrodynamometer utilizes the interaction between two current-carrying coils.
- When electric current flows through these coils, they create magnetic fields.
- The interaction of these fields results in a mechanical force.
- Working Mechanism:
- One coil, known as the fixed coil, is stationary and is often connected to the power supply.
- The other coil, called the moving coil, is free to rotate within the magnetic field produced by the fixed coil.
- As the current flows through both coils, the moving coil experiences a torque due to the magnetic forces acting on it.
- Measurement Feature:
- The degree of rotation of the moving coil is proportional to the strength of the current flowing through the coils.
- This rotation is translated into a readable value, often through a calibrated scale.
Applications
- Versatile Use:
- Electrodynamometers are widely used in laboratories for precise measurements of electrical quantities.
- They can measure both alternating current (AC) and direct current (DC) effectively.
In conclusion, the electrodynamometer leverages the force between two current-carrying coils to provide accurate measurements, making it an essential instrument in electrical engineering.
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Question Description
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