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The most suitable material for spring in majority of the measuring instruments, except in low resistance instruments is:
  • a)
    Phosphor - bronze
  • b)
    Platinum silver
  • c)
    Hard roller silver
  • d)
    Silicon-bronze
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The most suitable material for spring in majority of the measuring ins...
The essential requirements for instrument for instrument springs are:
1) They should be non-magnetic
2) They should be proof from mechanical fatigue
3) Where springs are used to lead current into moving system they should have a small resistance, their cross-sectional area must be sufficient to carry the current without temperature rise affecting their constant. They should also have a low resistance temperature coefficient.
For most applications phosphor bronze has been found to be the most suitable material except in instruments low in resistance (like multi-voltmeters).
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Most Upvoted Answer
The most suitable material for spring in majority of the measuring ins...

Phosphor-bronze is the most suitable material for springs in measuring instruments:

Phosphor-bronze offers several advantages that make it the most suitable material for springs in measuring instruments, except in low resistance instruments. Here are some key reasons:

High Elasticity:
- Phosphor-bronze has high elasticity, allowing it to return to its original shape after being compressed or stretched. This property is crucial for maintaining the accuracy and reliability of measuring instruments.

Corrosion Resistance:
- Phosphor-bronze is resistant to corrosion, which is important for ensuring the longevity of the springs in measuring instruments. This resistance makes phosphor-bronze suitable for use in a variety of environments.

Good Conductivity:
- Phosphor-bronze has good conductivity, which is essential for maintaining electrical contact in measuring instruments. This property ensures accurate measurements and reliable performance.

High Fatigue Resistance:
- Phosphor-bronze has high fatigue resistance, meaning it can withstand repeated stress cycles without deforming or breaking. This durability is crucial for the long-term functionality of measuring instruments.

In contrast, materials like platinum silver, hard roller silver, and silicon-bronze may not offer the same combination of elasticity, corrosion resistance, conductivity, and fatigue resistance as phosphor-bronze, making them less suitable for use in most measuring instruments.
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The most suitable material for spring in majority of the measuring instruments, except in low resistance instruments is:a)Phosphor - bronzeb)Platinum silverc)Hard roller silverd)Silicon-bronzeCorrect answer is option 'A'. Can you explain this answer?
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