Current sensitivity

Definition

Current sensitivity in a measuring instrument is the deflection per unit current. It indicates how effectively an instrument can detect small currents.

5 Must Know Facts For Your Next Test

1. Current sensitivity is commonly measured in divisions per milliampere (div/mA).
2. A high current sensitivity means the instrument can detect smaller currents more accurately.
3. Ammeters with higher current sensitivity are preferred for low current measurements.
4. The formula for current sensitivity is $S = \frac{\theta}{I}$ where $\theta$ is the deflection and $I$ is the current.
5. Increasing the number of turns in the coil of a galvanometer increases its current sensitivity.

Related terms

Galvanometer:

A device used to detect and measure small electric currents by deflection of a needle.

Deflection: The movement of a pointer or needle on a measuring instrument, indicating measurement value.

Milliampere: A unit of electric current equal to one-thousandth of an ampere.