A region of space contains a uniform electric field oriented along the y-axis. A frame of surface area A is placed perpendicular to the y-axis in the xz-plane. The magnitude of the electric flux through this frame is 0.
A second frame is placed in the same electric field in such a way that the magnitude of the electric flux through it is 0/2. How is the plane of second frame oriented with respect to the plane of the first one? A)
at a 90 angle
B)
at a 60 angle
C)
parallel to the first frame
D)
perpendicular to the first frame
E)
at a 30 angle
Question 2
A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs a hill. The top of the hill is at an elevation of 16 m.
What is the speed of the car at the top of the hill? Neglect any frictional effects. A)
14 m/s
B)
18 m/s
C)
10 m/s
D)
9 m/s
E)
6 m/s
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