3 Solved Problems on Introductory Physics - Examination 2 | PHYSICS 8B, Exams of Physics

Download 3 Solved Problems on Introductory Physics - Examination 2 | PHYSICS 8B and more Exams Physics in PDF only on Docsity! FROM : Fax NO. : Apr. 18 2802 18:19AM PL Physics 8B Spring 2002 (Section 1) MIDTERM 2 1. (20 points) A solenoid contains 300 turns/cm and has a radius of 2.0 em. It carries a time- varying current given by (2) = 0.10f + 0.50, measured in amps. At r= 2.0, find the magnitude of the electric field induced at a distance of (a) 1.0 cm and (b) 3.0 cm from the solenoid axis. Note: The magnetic permeability constant [ty is given by 4m. x 107 T-m/A. 2. (15 points) A ray of light traveling through water enters a piece of glass, as shown below. It then strikes a glass-air interface at the minimum angle necessary for total internal reflection. Find the angle that the original ray makes with the surface of the glass. Take the indices of refraction of glass, water, and air to be 1.50, 1.33, and 1,00, respectively. Woter 3. (15 points) An object is placed 15.0 cm in front of a mirror. The resulting image is upright, and has a magnification of 0.60. Find (a) the location of the image (i.e., the distance from the mirror, and whether it is in front of or behind the mirror), and (b) the focal length of the mirror. (c) Is it concave or convex? (d) Draw a ray diagram. (You only need to locate the image with two rays, but you may use more if that helps you.) FROM : FAX NO. of Apr. 18 2082 18:26AM Pe] Sock Phy tics ce MM dtern DL Seletens u —_ TT an de > pnd: L At =z (O80 tyme o7 (70 08al (a Yo) 2 T5ulo Vin Cor MeV) + Ch) Az reGps 2Ocm, roe FE met pha oe > BR ar ol Tee AO" Fe ue ar 4 4b = (ern C¥nela DCP aor ¢O.yoy 2 (0.63) > foowpom7 Vn Cae MeV 3) 2