8. (3 points) A bar magnet is broken in half and the two pieces are separated. W

Question

8. (3 points) A bar magnet is broken in half and the two pieces are separated. Which of the following diagrams shows the magnetic field lines from the two pieces? C) D) 9. (3 points) You have been asked to create a parallel beam of light using a bulb and a spherical mirror Where should the bulb be placed in relation to the mirror? (Careful, the choices are not in order on the figure.) A. Right against the glass B. At R, the radius of curvature C. At R/2 D. 2R 2R D) B) C) A 10. (3 points) Which situation describes light rays that are the closest to parallel? A. Moonlight B. Light reflecting off a flat bathroom mirror C. The reflection of a tree off a still pond D. Light from an overhead street lamp E. Light striking your eye after passing through prescription glasses 11. (3 points) A magnifying glass has a power of 4 Diopters. What is its focal length? A. 4 meters B. 4 cm C. 25 cm D. 1/4 cm E. 2.5 meters

Explanation / Answer

If you brake a bar magnet in half, you will end up with with two bar magnets, each with a North and South pole. The broken piece with the original south pole will develop a north pole at the breaking point, and the piece with the original north pole will develop a south pole.

Magnetic field lines flow North to South Pole.
Therefore,
Correct Option = (C)

Please post seperate question in sepetrate post.

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