Which equation is true regarding sensitivity?

Which equation is true regarding sensitivity?

• A. Sensitivity = voltage/pen deflection
• B. Pen deflection = sensitivity/voltage
• C. Voltage = sensitivity/pen deflection
• D. Sensitivity = pen deflection/voltage

Answer: (A)

Sensitivity is how much input voltage is needed to move the recording pen by a certain amount on the chart. If sensitivity is defined as volts per unit of deflection (for example, volts per division), then the pen deflection you observe equals the input voltage divided by that sensitivity. Rearranging gives sensitivity = voltage / pen deflection. This directly expresses how much voltage is required to produce a unit of deflection, which is the essence of sensitivity on chart recordings. For example, a 0.5 V input producing a 5-division deflection yields a sensitivity of 0.5 / 5 = 0.1 V per division.

Sensitivity is how much input voltage is needed to move the recording pen by a certain amount on the chart. If sensitivity is defined as volts per unit of deflection (for example, volts per division), then the pen deflection you observe equals the input voltage divided by that sensitivity. Rearranging gives sensitivity = voltage / pen deflection. This directly expresses how much voltage is required to produce a unit of deflection, which is the essence of sensitivity on chart recordings. For example, a 0.5 V input producing a 5-division deflection yields a sensitivity of 0.5 / 5 = 0.1 V per division.