Atmospheric pressure is measured using a device called a _______

Options

A. barometer
B. spherometer
C. hygrometer
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Atmospheric Pressure**: Atmospheric pressure is the force exerted by the weight of air above a surface. It is important to measure this pressure for various scientific and practical applications.

2. **Identifying Measurement Devices**: To find out which device measures atmospheric pressure, we need to consider the options provided:
- Option 1: Barometer
- Option 2: Spherometer
- Option 3: Hydrometer
- Option 4: None of these

3. **Analyzing Each Option**:
- **Barometer**: This device is specifically designed to measure atmospheric pressure. It typically uses a column of mercury or aneroid mechanisms to gauge the pressure exerted by the atmosphere.
- **Spherometer**: This device is used to measure the curvature of a surface, not atmospheric pressure.
- **Hydrometer**: This device measures the specific gravity of liquids, not atmospheric pressure.
- **None of these**: This option implies that none of the listed devices measure atmospheric pressure, which is incorrect since we have identified the barometer.

4. **Conclusion**: Based on the analysis, the correct answer to the question is that atmospheric pressure is measured using a **barometer**.

**Final Answer**: Atmospheric pressure is measured using a device called a **barometer**.

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