can someone explain how to solve these problems

16 17. 18. 19. 20. A wire of length 50.0 cm moves through a magnetic eld of ux density 1.00 x 11:}-2 T at a steady speed of 10.0 Ins1. What EMF is induced in the wire if between the wire and magnetic eld there is an angle of 90.0\"\"? (a) 15.nv (b)5.[10 x 10-1 v (c) 5.00 x 10-h; (d)15.0 x 10-3v You are in the USA and you buy a hair dryer rated at 1200 W. In the USA the mains electricity supply is at 120 V. You bring the hair dryer back with you to Australia and power it from our 240V mains supply. What power is drawn when using it in Australia? (a) 1200 W (b) 2400 W (C) 600 W ((1) 4800W Continuing with the previous question: You buy a transformer to reduce the 240 V mains supply to 120 V. If the transformer has 110 turns in its primary coil. how many turns comprise its secondary coil? (a) 55 (b) 110 (c) 220 (d) It depends on the material used in the com If 65 MW of power at 450 kV (nus) arrives at a town from a generator via 4.6 (1 transmission lines. What fraction of the power generated is wasted in the lines? (a) 0.15% (b) 2.1% (C) 59% (:1) 8.0% Continuing with the previous question. what is the voltage drop across the power line, between the generator and the town? (a) ssv @553: (e) 660V (d) 661W