Consider two coils, (C1) of 1000 turns and (C2) of 500 turns; the surface area of each of the turns of (C1) and (C2) is 100 01122. {01) {02) 3111111 mm The coil (C1) is connected to a sensitive ammeter (A) and the coil (C2) is connected across a generator thus forming two closed circuits. (Fig. 1) The coil (C2) carries then a current i that varies with time as shown in the graph of figure 2. As a result at, (C2) produces, through (C1), a magnetic field B supposed uniform of magnitude B = 2x103i (B in T and i in A). 1) Give the expression of the magnetic flux crossing (C1) in terms of i. 2) Give the expression of e, the e.m.f. induced in (C1). 3) Find the values of e for Os st 52 5 s . 4) Trace the graph giving the variation of e as a function of time t for Os st 52 5 3. Scale: on the time axis: 1cm > 5 s and on the axis of e: 1cm > 4 mV. 5) Draw again the figure above and indicate, using Lenz's law, the direction of the current induced in (C1), i the interval of time Os st 55 s . i(A) It's-.1