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Which of the following types of instruments depends on the iron vane's attraction to the current-carrying coil to be measured for proper operation?
- a)PMMC instrument
- b)Moving-iron instrument
- c)Moving-scale instrument
- d)PMM instrument
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
Which of the following types of instruments depends on the iron vanes ...
Moving-iron instrument depends on the iron vane's attraction to the current-carrying coil to be measured for proper operation.
Moving-iron instrument:
Moving-iron instrument:
- Whenever a piece of iron is placed nearer to a magnet it would be attracted by the magnet. The force of this attraction depends upon the strength of the magnetic field.
- If the magnet is an electromagnet then the magnetic field strength can easily be increased or decreased by increasing or decreasing the current through its coil.
- Accordingly, the attraction force acting on the piece of iron would also be increased and decreased.
- Depending upon this simple phenomenon, the moving iron instrument was developed.
Most Upvoted Answer
Which of the following types of instruments depends on the iron vanes ...
Moving-iron instrument depends on the iron vane's attraction to the current-carrying coil to be measured for proper operation.
Moving-iron instrument:
Moving-iron instrument:
- Whenever a piece of iron is placed nearer to a magnet it would be attracted by the magnet. The force of this attraction depends upon the strength of the magnetic field.
- If the magnet is an electromagnet then the magnetic field strength can easily be increased or decreased by increasing or decreasing the current through its coil.
- Accordingly, the attraction force acting on the piece of iron would also be increased and decreased.
- Depending upon this simple phenomenon, the moving iron instrument was developed.
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Question Description
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