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In electrodynamometer movement, the deflection of the pointer is:
- a)inversely proportional to the current
- b)directly proportional to the current
- c)inversely proportional to the current squared
- d)directly proportional to the current squared
Correct answer is option 'D'. Can you explain this answer?
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In electrodynamometer movement, the deflection of the pointer is:a)inv...
In all instruments except the Moving coil, the measured value is directly proportional to the square of response. They exhibit square law.
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In electrodynamometer movement, the deflection of the pointer is:a)inv...
Electrodynamometer Movement:
Deflection of the pointer in an electrodynamometer movement is directly proportional to the square of the current passing through it. This means that the deflection of the pointer increases quadratically with an increase in current.
Explanation:
- Principle: The electrodynamometer movement is based on the principle that when a current-carrying conductor is placed in a magnetic field, a mechanical force is exerted on the conductor. This force causes the pointer attached to the conductor to deflect.
- Current Squared Relationship: The force experienced by the conductor, and hence the deflection of the pointer, is directly proportional to the square of the current passing through it. This relationship is due to the interaction between the magnetic field and the current-carrying conductor.
- Mathematical Representation: Mathematically, the deflection (θ) of the pointer in an electrodynamometer movement can be represented as θ ∝ I^2, where I is the current passing through the conductor.
- Calibration: By calibrating the electrodynamometer movement with known currents, the scale on the meter can be marked accordingly. This allows for accurate measurement of current based on the deflection of the pointer.
- Advantages: The square relationship between current and deflection provides a sensitive and accurate method for measuring current using an electrodynamometer movement. This makes it suitable for applications where precise current measurement is required.
In conclusion, the deflection of the pointer in an electrodynamometer movement is directly proportional to the square of the current passing through it, making it a reliable and precise instrument for measuring current.
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In electrodynamometer movement, the deflection of the pointer is:a)inversely proportional to the currentb)directly proportional to the currentc)inversely proportional to the current squaredd)directly proportional to the current squaredCorrect answer is option 'D'. Can you explain this answer?
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