ooo VIVA LTE @蚕65% D + 7:26 PM session.masteringphysics.com Item 2 MasteringPhysics ltem 2 A 3.00-m length of copper wire at 20 C has a 1.20-m-long section with diameter 1.6 mm and a 1.80-m-long section with diameter 0.80 mm. There is a current of 2.3 mA in the 1.6 mm -diameter section. Part A What is the current in the 0.80 mm -diameter section? Express your answer using two significant figures. mA Submit Give UP Part B What is the magnitude of E in the 1.6 mm-diameter section? Express your answer using two significant figures. V/m Submit Give Up