When it has been determined that the voltage to a unit is approximately 115 volts, which range should an analogue meter be set at to achieve the most accurate reading?

When it has been determined that the voltage to a unit is approximately 115 volts, which range should an analogue meter be set at to achieve the most accurate reading?

• A. 0-100 volts
• B. 0-150 volts
• C. 0-250 volts
• D. 0-500 volts

Answer: (C)

To achieve the most accurate reading with an analogue meter set to measure a voltage of approximately 115 volts, it is ideal to select a range that closely encompasses the expected voltage level without being overly broad. The choice of setting the meter to a range of 0-150 volts is appropriate because it allows the meter to operate well within the mid-range of its capabilities. This range will provide sufficient resolution and sensitivity for measuring a voltage close to 115 volts. Choosing a narrower range, like 0-100 volts, would not be advisable since it does not accommodate the expected voltage and could lead to inaccuracies or difficulty in taking the reading. On the other hand, selecting a range such as 0-250 volts would be less optimal. While it would technically record the voltage, it would not use the full scale of the meter effectively, potentially reducing measurement precision. Similarly, the 0-500 volts range is excessively broad, likely resulting in an even lower precision. The ideal situation is to select a range that is slightly above the expected value to ensure accurate and reliable readings, making 0-150 volts the most suitable choice in this case.

To achieve the most accurate reading with an analogue meter set to measure a voltage of approximately 115 volts, it is ideal to select a range that closely encompasses the expected voltage level without being overly broad. The choice of setting the meter to a range of 0-150 volts is appropriate because it allows the meter to operate well within the mid-range of its capabilities. This range will provide sufficient resolution and sensitivity for measuring a voltage close to 115 volts.

Choosing a narrower range, like 0-100 volts, would not be advisable since it does not accommodate the expected voltage and could lead to inaccuracies or difficulty in taking the reading. On the other hand, selecting a range such as 0-250 volts would be less optimal. While it would technically record the voltage, it would not use the full scale of the meter effectively, potentially reducing measurement precision. Similarly, the 0-500 volts range is excessively broad, likely resulting in an even lower precision.

The ideal situation is to select a range that is slightly above the expected value to ensure accurate and reliable readings, making 0-150 volts the most suitable choice in this case.