Enter the letters corresponding to all the true statements.

1. At a certain location there is a constant horizontal magneticfield pointing to the east. A square loop of wire is placed in thisfield. At time A the bottom of the loop is resting on the floor(which is insulating), and the plane of the square loop is verticaland perpendicular to the magnetic field. The loop tips over and attime B it is flat on the floor. For this situation...

A) The induced current is greatest just before the loop startsto tip
     B) While the loop is tipping over, theinduced current is flowing northward through the bottom side of thesquare
     C) The magnetic flux does not change as aresult of the loop tipping over
     D) Current is induced to flow in the loopbecause the magnetic flux is changing
     E) Before the loop starts to tip over,there is no induced current in the square loop

2. Electromagnetic waves are traveling straight down towards thecenter of the earth. For these waves...

     A) if the electric field points east, theassociated magnetic field points north
     B) if the electric field points north, theassociated magnetic field points east
     C) a high-frequency wave has a shorterwavelength than a low-frequency wave
     D) green light has a higher frequency thanblue light
     E) visible light has a longer wavelengththan ultraviolet light