Resistors and Ohm's Law Video Lessons

Concept

# Problem: A certain ammeter has a resistance of 2.5 x 10-3 Ω on a scale which reads up to 2.5 A, and contains a 12-Ω galvanometer. What is the sensitivity of the galvanometer, in microamperes.IG = ?

###### FREE Expert Solution

Galvanometer current sensitivity and ammeter are related by:

$\overline{){{\mathbf{I}}}_{{\mathbf{G}}}{\mathbf{r}}{\mathbf{=}}{\mathbf{I}}{\mathbf{R}}}$

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###### Problem Details

A certain ammeter has a resistance of 2.5 x 10-3 Ω on a scale which reads up to 2.5 A, and contains a 12-Ω galvanometer. What is the sensitivity of the galvanometer, in microamperes.

IG = ?