1. A 15-m long wire carries a 5-A current. What is the magnetic field 2 m away from the wire? 2. Draw the magnetic field lines for the following cases: (a) Current carrying wire that is: straight, bent into a square, bent into a circle. [use the convention: x = magnetic field into page, 0 = magnetic field out of page.] (b) Single bar magnet (c) Two bar magnets with north pole adjacent north pole (d) Two bar magnets with north pole adjacent south pole 3. A 10 C charge is moving with a speed of 100 m/s in a magnetic field of strength 2 T. If the angle between magnetic field and the direction of travel of the charge is 20, what is the magnitude of the magnetic force on the charge? 4. A magnetic field of strength 0.3 T is directed perpendicularly onto the area formed by a wire bent into a circular loop of radius 50 mm. What is the magnetic flux through the area? 5. (a) A circular coil of radius 20 cm is placed in an external magnetic field of strength 0.2 T so that the plane of the coil is perpendicular to the field. The coil is pulled out of the field in 0.5 s. Find the average induced emf during this interval. (b) A bar of length 2 m slides along metals rails at a speed of 5 m/s in a magnetic field of 0.2 T. What is the motional emf induced in the bar and rails? 6. Calculate the voltage output by the secondary winding of a transformer if the primary voltage is 50 V, the secondary winding has 1500 turns, and the primary winding has 400 turns. 7. A ray of light is incident on a plane mirror at an angle of 250, and then reflected. What is the angle of reflection? 8. A ray of light is incident from air onto a flat surface of a slab of glass at an angle of 30. Upon hitting the glass surface, some of the light is reflected off the glass, and the rest refracted into the glass. What is the angle of refraction of the refracted light? Assume the index of refraction of air be 1.00, and of glass be 1.50. 9. A ray of light is incident from glass onto a glass-air interface. If the light undergoes total internal reflection, what is the critical angle for total internal reflection? Assume the index of refraction of air be 1.00, and of glass be 1.50. 10. A ray of light propagates through a prism depicted below. If 0 = 75 and b = 60, and the refractive index of air is 1.00 and of glass is 1.52, what is angle x? Air b Air e a B d Glass a