If the sensitivity is 7μV and the voltage is 20μV, what is the measurement of the deflection?

If the sensitivity is 7μV and the voltage is 20μV, what is the measurement of the deflection?

• A. -2.3mm
• B. -3mm
• C. -2.9mm
• D. -3.9mm

Answer: (C)

To determine the measurement of the deflection based on sensitivity and voltage, you can use the formula: Deflection (in mm) = Voltage (in μV) / Sensitivity (in μV/mm) In this case, the voltage is 20μV and the sensitivity is 7μV. Substituting these values into the formula gives: Deflection = 20μV / 7μV/mm = approximately 2.857mm Since the choices provided include a negative value, you would express the deflection in the context specified in the question. Depending on whether the deflection is considered upward or downward, the sign might be relevant in a clinical scenario. When rounded to the nearest tenth, this value can be expressed as -2.9mm, reflecting the common practice in interpreting EEG measurements where downward deflections are indicated by a negative sign. Thus, the answer of -2.9mm is consistent with the calculation based on sensitivity and voltage, as this reflects the expected deflection given the parameters provided.

To determine the measurement of the deflection based on sensitivity and voltage, you can use the formula:

Deflection (in mm) = Voltage (in μV) / Sensitivity (in μV/mm)

In this case, the voltage is 20μV and the sensitivity is 7μV. Substituting these values into the formula gives:

Deflection = 20μV / 7μV/mm = approximately 2.857mm

Since the choices provided include a negative value, you would express the deflection in the context specified in the question. Depending on whether the deflection is considered upward or downward, the sign might be relevant in a clinical scenario.

When rounded to the nearest tenth, this value can be expressed as -2.9mm, reflecting the common practice in interpreting EEG measurements where downward deflections are indicated by a negative sign.

Thus, the answer of -2.9mm is consistent with the calculation based on sensitivity and voltage, as this reflects the expected deflection given the parameters provided.