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30. Induction and Inductance - Parte 2 di 3!

30. Induction and Inductance / Faraday's Law with Calculus / Problema 12

Problema 12

What is the area of a circular loop of radius $r$ ?

A

$4 pi r squared$

B

$π d$

C

$2 pi r$

D

$π r^{2}$