Post Utme Lautech 2021 Physics Question 28

Practice objective / multiple choice question 28 from the 2021 Post Utme Lautech Physics examination.

Post Utme Lautech 2021 Physics Objective / Multiple Choice

Question 28 POST_UTME_LAUTECH • 2021 • PHYSICS • objective

A magnetic field $B$ is directed perp\endicular to the plane of a circular loop of wire with a radius $r$. The loop carries a current $I$ and has a resis\tance $R$. If the magnetic field is increased to $2B$, what is the new induced emf $\epsilon_{new}$?

A. 2\pi r^2 I R

B. \pi r^2 I R

Correct Answer C. 2\pi r^2 I B

D. \pi r^2 I B

Correct Answer

Correct Option:

2\pi r^2 I B

This is Post Utme Lautech 2021 Physics Question 28. It is one of the objective questions from the 2021 Post Utme Lautech Physics examination.

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