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Consider the following statements associated with an energy meter.
1. It is an integrating type instrument.
2. It is an induction type instrument.
3. It uses a permanent magnet for rotation of aluminium disc.
4. it employs a high control torque.
Which of these statements are correct ?
  • a)
    1, 2, 3 and 4
  • b)
    1 and 2 only
  • c)
    2 and 3 only
  • d)
    3 and 4 only
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Consider the following statements associated with an energy meter.1. I...
Understanding the Energy Meter
Energy meters are essential devices used to measure electrical energy consumption. Let's analyze the statements provided to determine their correctness.
1. Integrating Type Instrument
- Energy meters are indeed integrating type instruments.
- They accumulate energy over time, providing a total energy consumption reading.
2. Induction Type Instrument
- Most conventional energy meters operate on the principle of electromagnetic induction.
- They measure energy consumption by inducing currents in a rotating disc, which is a hallmark of induction type instruments.
3. Permanent Magnet for Rotation of Aluminium Disc
- This statement is incorrect.
- Energy meters do not typically use permanent magnets to rotate the disc. Instead, the rotation is caused by electromagnetic forces generated by the induced currents in the coils.
4. High Control Torque
- The concept of control torque relates to the damping mechanism in energy meters.
- Energy meters generally require a low control torque to allow the disc to rotate freely and accurately measure the energy consumption. Thus, this statement is misleading.
Conclusion
Based on the analysis:
- Statements 1 and 2 are correct.
- Statements 3 and 4 are incorrect.
Therefore, the correct answer is option b) 1 and 2 only.
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Consider the following statements associated with an energy meter.1. It is an integrating type instrument.2. It is an induction type instrument.3. It uses a permanent magnet for rotation of aluminium disc.4. it employs a high control torque.Which of these statements are correct ?a)1, 2, 3 and 4b)1 and 2 onlyc)2 and 3 onlyd)3 and 4onlyCorrect answer is option 'B'. Can you explain this answer?
Question Description
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