일반물리학 2 — Induction and Inductance: Problem 58

58 For the wire arrangement in Fig. 30-48, \( a = 12.0 \text{ cm} \) and \( b = 16.0 \text{ cm} \). The current in the long straight wire is \( i = 4.50t^2 - 10.0t \), where \( i \) is in amperes and \( t \) is in seconds. (a) Find the emf in the square loop at \( t = 3.00 \text{ s} \). (b) What is the direction of the induced current in the loop?