Question

Figure shows circuit consisting of an ideal battery with emf τ·604 A. a resistance R, and a small wire loop of area 7.4 cm2 For the time interval-24 s to f . 48 s, an external magnetic field is set up throughout the loop. The field is uniform, its direction is into the page in Figure (a), and the field magnitude is given by 8-at, where B is in teslas, a is a constant, and t is in seconds. Figure (b) gives the current in the circuilt before, during, and after the external field is set up. The vertical axis scale is set by l-3.5 mA, and the horizontal axis scale is set by t 72s. Find a. 3 r (s) the tolerance is +/-I in the 2nd significant digit

Answer 1