Question

Queston1 and 2 please

01 points I Previous Aniswers SerPSE10 30.1.OP001. My Notes AskY A single loop of nickel wire, lying flat in a plane, has an area o 7.80 cm2 and a resistance of 1.80 . A unitorm magnetic field points perpendicular to the plane of the loop. The field initially has a magnitude of 0.500 T, and the magnitude increases linearly to 3 a tima of 1.10s. what is the induced current (in mA) in the loop of wirc over this time? 0 120 How doss Faraday's law ralate the change in Alux per unit time to the amf? What are the initial and final Aux vakues through the loop? How is tha induced emf relatad to the resistance and induced currant? Re careful of units-note tha final answer should ba a in mA. ma Need Help? -1 points SerPSE10 30.1P004 My Notes AskY The gura below displays until its area is nearly zero, taking a time of 0.1S0 s to do so. What is the magnitude of the average induced enf in the loop (in v) during this time? circular oop of conducting wra in a uniform magnatic eld pointina into the page. The radlus of th a nop s l D cr and tha magnitud of the field is 0.160 T You grab ponts A and 8 and pull them n opposite drections stretching t Need Help? Readi

Answer 1

Given for the loop, Area (A) = 7.8 cm^2 resistance r = 1 Ohm. Given charge in magnetic field = 3 times 0.5 - 0.5/1.1 = 0.91 T/s so now epsilon = d phi/dt = A middot dB/dt = 7.8 times 10^-4 times 0.91 I = epsilon/R = 7.8 times 10^-4 times 0.91/1 I = 7.1 times 10^-4 = > I = 0.71 mA Induced current = 7.1 times 10^-4 A = 0.71 mA epsilon = B middot dA/dt = 0.16 times (pi times 0.15^2)/0.150 epsilon = 0.075398 V epsilon = 75.3 mV