Question

What is the SI unit of sensitivity?

Answer 1

The SI unit of sensitivity depends on the context in which it's being used. Sensitivity generally refers to the ability of a system or device to detect small changes in input. It is often expressed as the ratio of the output change to the input change.

1. **In terms of physical measurements (e.g., for sensors)**:
   Sensitivity is commonly expressed as a ratio of output change to input change, such as:
   - For a **voltage sensor**: The sensitivity could be expressed in **volts per unit of input** (like volts per degree Celsius, or volts per watt of power).
   - In this case, the **SI unit** could be **V/°C** (volts per degree Celsius) or **V/W** (volts per watt), depending on what the sensor is measuring.

2. **For a signal processing system (e.g., a microphone)**:
   The sensitivity is often expressed as the output signal level per unit input signal, and the SI unit for output is generally in **volts** or **amps** depending on the system. The input could be a physical quantity such as pressure, light, or temperature.

So, the SI unit of sensitivity isn't fixed—it varies based on the type of sensor or system. It's often a combination of units like **volts per unit of input** or other relevant units for the specific measurement being made.