FOR QUESTIONS 10-11 itive region of space in which there is a uniform three-dime
ID: 1562210 • Letter: F
Question
FOR QUESTIONS 10-11 itive region of space in which there is a uniform three-dimensional is placed at rest at the center of a and direction a electric field. field is one whose strength (A uniform same at all points within the region.) 10. When the positive charge is released uniform electric field, what will its from rest in the subsequent motion be? It will move at a constant speed. (b) It will move at a constant velocity. (c) It will move at a constant acceleration. (d) It will move with a linearly changing acceleration. (e) will remain at rest in its initial position. 11. What happens to the electric potential energy of the positive after the charge is released from rest in the uniform cha electric field? (a) It will remain constant because the electric field is uniform. (b) It will remain constant because the charge remains at rest (c) It will increase because the charge will move in the direction of the electric field. (d) It will decrease because the charge will move in the opposite direction of the electric field (e) It will decrease because the charge will move in the direction of the electric field 12. A positive charge might be placed at one of two different locations in a region where there is a uniform electric field, as shown below. How do the electric forces on the charge at positions 1 and 2 compare? (a) Force on the charge is greater at 1. (b) Force on the charge is greater at 2. (c) Force at both positions is zero. (d) Force at both positions is the same but not zero. but is in opposite directions. (e) at both positions has the same magnitude The figure below shows a hollow conducting metal sphere which was given initially an evenly distributed positive charge on its surface. Then a posi tive charge +Q was brought up the sphere as shown. What is the direction of the electric field at the center of the sphere after the 13 positive charge +Q is brought up near the sphere? (a) Left (b) Right Up (c) Down (d) zero field (e) CTYC Physics Workshop ProjectExplanation / Answer
10.C
The charge will feel a force in the direction of the electric field (F=Eq) and thus it will accelerate with a constant acceleration. (Just like releasing an object above the earth's surface - constant acceleration, at least until it hits something.)
11.The potential energy decreases, converted to kinetic energy
12.D
Force at both positions is same but not Zero
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