Answer to Question #51845 in Physics for Samuel

Question

20 For a metallic conductor, Ohm's law holds provided (a) potential difference varies (b) current remains constant (c) temperature remains constant (d) potential difference remains constant
8 Which of the following precautions is NOT applicable to experiment involving planoconvex lens?
a) planoconvex lens should have small focal length b) parallax error should be avoided c) the surface of the lens should be cleaned properly d) the tip of the optical pin should be at the same level with the principal axis of the lens
9 A glass prism of refracting angle 60 degrees gives a minimum deviation of 47degrees. What is the refractive index of the glass? a) 1.61 (b) 1.20 (c) 1.52 (d) 1.41