Home > Electronic Tutorials > Formulas used in Electronics > Ammeter Shunt Calculation

Electronic Formulas / Formulae

Ammeter Shunt Formula Calculation

The resistance RP to be connected in parallel with an ammeter of full scale current IA and full scale voltage drop VA to increase the full scale current to I is:

RP = VA / (I - IA)

The power P dissipated by the resistance RP with voltage drop VA carrying current (I - IA) is:
P = VA2 / RP = VA(I - IA) = (I - IA)2RP

Note: To report broken links or to submit your projects please send email to Webmaster