Question

.. 471 ke = 9E9; e=1.6E-19C; 4. = 4x x10 ; m, = 1673E-30 kg; me = 0.911E-30 kg Ho Osü xp Holline ; qu = 12; μοNIloop Holsolen N r2 B-B ;B 2 = MEI ; 2nd 2 R L qü x B ; NIA XB ; -NIA-B ; -löxB). ΔΙ A(B-A) EZEN $N L ; -L ; r = RC At ; E=IX ; X =R, At 5. N iol ioC 2μο 1 R 1. A 560-tum coil with diameter 80 mm sits above the lecture table as shown. A permanent magnet 0.70 T North pole slides underneath the coil in 0.50 s. a) what direction is the final magnetic field? b) draw the direction of the induced electric field in the wire c) calculate the average induced emf in the coil () 2. A transformer is intended to output 2.0 Amp at 6.3 VAC when plugged into 115 VAC. The primary coil has 200 turns. a) how many turns should the secondary coil have? b) how much current (RMS) would the transformer's primary draw from the wall? c) what power does this transformer provide? d) what is the maximum voltage at the output? e) what is the reactance of the output coil (as an inductor)? f) if this is working in the USA, calculate the inductance for the output coil

Answer 1

all Vg = 6:3V, Is = 2A, Vp = 115 V Np = 200 (a) Vs Up - NS Ns NP 6.3 115 200 Ng = 10.9 = 11 6. 3x200 115 u (6) Vs vs vp IP 1 Is Ip = 6.3 115 = 0·11 A x 2 Eptoms (C) P = Ves = 6.3x2 = 12.6 W (d) Vsco) 6.3 2 8.9v = (e) R.B Vs Is A 6:3 2 3.15 ohm =