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The speed of a gear having 60 teeth is measured using a proximity sensor. The output of the proximity sensor is fed to a counter with a gating time of 1s. The counter indicates a value of 120. The speed at which the gear is rotating is (2008)
  • a)
    60 rpm
  • b)
    120 rpm
  • c)
    600 rpm
  • d)
    1200 rpm
Correct answer is option 'B'. Can you explain this answer?
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Given:
- Number of teeth on the gear = 60
- Output of the proximity sensor = 120
- Gating time of the counter = 1s

To Find:
The speed at which the gear is rotating.

Explanation:
The output of the proximity sensor is fed to a counter with a gating time of 1s. This means that the proximity sensor will be triggered once every second and the counter will count the number of triggers.

Since the gear has 60 teeth, for every revolution of the gear, the proximity sensor will be triggered 60 times. Therefore, the counter value of 120 indicates that the gear has completed 2 revolutions within the gating time of 1 second.

Calculation:
The number of revolutions per minute (rpm) can be calculated using the formula:

rpm = (Number of revolutions / Gating time) * 60

Substituting the given values:
rpm = (2 / 1) * 60
rpm = 120

Answer:
Therefore, the speed at which the gear is rotating is 120 rpm (option B).
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The speed of a gear having 60 teeth is measured using a proximity sensor. The output of the proximity sensor is fed to a counter with a gating time of 1s. The counter indicates a value of 120. The speed at which the gear is rotating is (2008)a)60 rpmb)120 rpmc)600 rpmd)1200 rpmCorrect answer is option 'B'. Can you explain this answer? for GATE 2025 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about The speed of a gear having 60 teeth is measured using a proximity sensor. The output of the proximity sensor is fed to a counter with a gating time of 1s. The counter indicates a value of 120. The speed at which the gear is rotating is (2008)a)60 rpmb)120 rpmc)600 rpmd)1200 rpmCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for GATE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The speed of a gear having 60 teeth is measured using a proximity sensor. The output of the proximity sensor is fed to a counter with a gating time of 1s. The counter indicates a value of 120. The speed at which the gear is rotating is (2008)a)60 rpmb)120 rpmc)600 rpmd)1200 rpmCorrect answer is option 'B'. Can you explain this answer?.
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