Please answer part A and please show work for understanding! Please and ThankYou

Question

Please answer part A and please show work for understanding! Please and ThankYou!
Part A Calculate the induced emf The magnetic field perpendicular to a circular wire loop 7.8 cm in diameter is changed from +0.30 T to -061 T in 180 ms, where + means the field points away from an observer and- toward the observer Express your answerusing two significant figures. d5.10 Submit Previous Answers Request Answer Incorrect; Try Again; 5 attempts remaining PartB In what direction does the induced current flow? The induced current is clockwise The nduced current is counterclockwise.

Explanation / Answer

diameter d = 7.8cm = 0.078 m
radius r = d/2 = 0.039m
area A = r2 = 0.00477 m2
change in time t = 180 * 10^-3 s
change in magnetic field
      induced emf = = -NA dB/ dt
                                =- 1 ( 0.0047 ) ( (-0.61 - 0.30)/ 180 * 10^-3s
                                = 2.37*10^-3 V

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