1. When a current flows in a coil of wire, there exists a magnetic field the coil. Which of the following would not make the magnetic field inside the coil stronger? a. Increase the current in the coil of wire b. Put an iron core inside the coil c. Reverse the direction of the current d. Squeeze the loops of wire closer together

2. The diagram shows the wave pattern of incident and reflected waves. The arrows indicate the direction of travel of these waves. If the angle of incidence is 45. What is the angle of reflection?

a. less than 45

b. more than 45

c. equal to 45

d. double 45