a. positive 13. Which b. negative c opposite of the following statement about El
ID: 2032419 • Letter: A
Question
a. positive 13. Which b. negative c opposite of the following statement about Electric Field Lines is true? a. They point They start on positive charges and end on negative charges c. They start on negative charges and end on positive charges 14. Which of the following material allows a. insulator b. 15. Which of the following is NOT true for electric current? a. Current flows from higher voltage to lower b. The direction of current is defined as the direction of c. There is no current flow voltage. through an open-circuit branch. flow of electrons 16. Which of the following component provides energy for the cun a. battery b. light bulb rent flowing in a cro 17. A light bulb is connected to a battery so that current flows c. wire d. voltage meter through the bulh, which correct statement: a. The amount of current going into the bulb equals the current leaving the bub b. The amount of current entering the bulb is greater than the amount of c. The amount of current entering the bulb is smaller than the amount of curent 18. Which of the following wave is NOT transverse wave? 19. You hear a voice. Which of the following is travelling from the source to your ear? 20. Among a set of pipes with same a. ocean wave b. light wave c sound wave a. air molecules b. free electrons in the air . sound wave energy d light wa nerg a. the longest b.the shortest width but different lengths, which one makes highest ph c. no difference waves differ from sound waves by all of the following EXCEPT a. light waves b. light waves are longltudinal c. light travels much, much faster than sound d. light can travel through outer space while sound cannot 21. Light mechanical waves are electromagnetic waves while sound are waves while sound are transverse waves in alk 22. Light reflection is a. light energy being taken away by material b. bouncing back of light from a smooth surface, at a specific angle c bending of light when passing into a different medium at an angle d. bending of light around a tiny hole 23. A virtual image a is formed by converging light rays b. has s a negative image distance c can be shown on a screen lens can converge light to form a focused real image? c concave lens a planar lens (flat) convex lens 25. Which is NOT true for imaging with plane the image is a virtual image the image has the same size as the object the image distance is the same object distance, the image is vertically inverted (upside down) a? as the object distance, but in the other side of the mimorExplanation / Answer
17] a - current is same in a series circuit.
18] b - lightwave is lomgitudinal wave.
19] c - sound wave energy travels.
20]b - shortest has lowest wavelength, highest frequency and highest pitch.
21]b it is lomgitudinal in air
22] b
23] b- in convex lens, it has negative image distance.
24] b
25] d, it is laterally inverted, i.e. leftside becomes right.
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