When measuring voltage with a multimeter, it is essential to select an appropriate range setting that is above the voltage you expect to measure but not excessively high, as this can reduce the measurement's accuracy.
1. Evaluate the given options:
- A. 5V: This setting is too low since you are measuring approximately 12 volts. Using a 5V setting could damage the multimeter or give an incorrect reading.
- B. 10V: This setting is still too low since it is below the 12 volts you intend to measure. It wouldn't suffice for an accurate measurement.
- C. 20V: This setting is appropriate because it is higher than the expected 12 volts but not excessively high. It falls within a reasonable range for accurate measurement.
- D. 100V: Although this setting would avoid any danger of overloading the multimeter, it is too high relative to 12 volts and would lead to a less accurate measurement.
2. Determine the best range setting:
- The recommended practice in using a multimeter is to select a range that is just above the voltage you expect to measure to ensure both safety and accuracy.
- Given that you are measuring approximately 12 volts, the 20V setting is just above the expected measurement.
3. Conclusion:
- The 20V setting allows the multimeter to measure the voltage accurately without risking overload or inaccuracy.
Thus, the best meter range setting to measure approximately 12 volts is C. 20V (Option C).
