일반물리학 2 — Induction and Inductance: Problem 77

77 In Fig. 30-58, the magnetic flux through the loop increases according to the relation \(\Phi_B = 3.0t^2 + 7.0t\), where \(\Phi_B\) is in milliwebers and \(t\) is in seconds. (a) What is the magnitude of the emf induced in the loop when \(t = 1.5 \text{ s}\)? (b) Is the direction of the current through \(R\) to the right or left?