Asked by huhhf3;q
Which of these statements is true? (1 point) No error is irreversible. The ratchet on a micrometer is there to protect the micrometer. • The magnet in an ammeter is permanent and cannot have its strength altered. A zero error of a measuring instrument cannot be fixed.
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GPT-5 mini
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The true statement is: "The ratchet on a micrometer is there to protect the micrometer."
Brief reasons:
- No error is irreversible — false. Some errors (e.g., permanent damage or wear) can be irreversible.
- Ratchet on a micrometer — true. It limits the applied force to prevent overtightening and ensures consistent pressure for accurate readings.
- Magnet in an ammeter is permanent and cannot have its strength altered — false. Magnet strength can change (temperature, demagnetization) and some ammeters use electromagnets.
- A zero error of a measuring instrument cannot be fixed — false. Zero errors can usually be corrected by adjustment or by applying an offset (calibration).
Brief reasons:
- No error is irreversible — false. Some errors (e.g., permanent damage or wear) can be irreversible.
- Ratchet on a micrometer — true. It limits the applied force to prevent overtightening and ensures consistent pressure for accurate readings.
- Magnet in an ammeter is permanent and cannot have its strength altered — false. Magnet strength can change (temperature, demagnetization) and some ammeters use electromagnets.
- A zero error of a measuring instrument cannot be fixed — false. Zero errors can usually be corrected by adjustment or by applying an offset (calibration).
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