Question

As shown in the figure, a wire and a 10-0 resistor are used to form a circuit in the shape of a square, 20 cm by 20 cm. A uniform but nonsteady magnetic field is directed into the plane of the circuit. The magnitude of the magnetic field is decreased from 1.50 T to 0.50 T in a time interval of 63 ms. The average induced current and its direction through the resistor, in this time interval, are closest to - 20 cm XXX XXX x 20 cm X X X WW 100 38 mA. from b to a 95 mA from a tob 63 mA from a to b 63 mA from btos 38 mA. from a tot

Answer 1

Answer:- Given that The wire and a 102 resistor are used to form circuit in the square shape of The magnetic field is decreased from 1-50 T • by 20cm to o.50T in a time interval of 63 ms. € 20cm Х X X X 20cm X X x a 102 bo Area (A) = (20x10-2 )x{20x102) (0.2) m² we know that voltage induced AV = do dt d at (BA) AV - A. dB dt (0.2% 1-5 0.5 0.063 0.6349206 V current induced 1 - AV R 0-6349206 I: 10 I O-OG 3 49206 A ΟΥ I ~ 63 MA

Since the external field is decreasing into the page, then 2 current by lena's law, the induced produces a field into the Opposes that charge it page Current travels from b to a so the answer is 63mA, from bto a So option ) is correct.