Physics

Problem

16. A square loop of wire of resistance

R

and side

a

is oriented with its plane perpendicular to a magnetic field

\mathbf{B}

, as shown. What must be the rate of change of the magnetic field in order to produce a current

I

in the loop? (A)

I R / a^{2}

(B)

I a^{2} / R

(C)

I a / R

(D) IRa ![](https://storage.googleapis.com/diraq-contents/question-bank/question-images/15aea1cd8382/2025_11_20_a06764ffad9cea2721f0g-12.jpg)