I am studying for my final and need to makesure I am studying correctly. No need

ID: 1729627 • Letter: I

Question

I am studying for my final and need to makesure I am studying correctly. No need for details, just select thecorrect answer. If I have questions about a particular question, Iwill respond back with a specific question.

1) A negatively charged rod is brought near one end of anuncharged metal bar. The end of the metal bar farthest fromthe charged rod will be charged

A) negative. B) neutral.

C) positive. D) none of the given answers

2) If a conductor is in electrostatic equilibrium near anelectric charge

A) the total charge on the conductor must be zero.

B) the electric field on the surface of the conductor isperpendicular to the surface.

C) the total electric field of the conductor must be zero.

D) the force between the conductor and the charge must bezero.

3) Three identical point charges of 2.0 C are placedon the x-axis. The first charge is at the origin, the secondto the right at x = 50 cm, and the third is at the 100 cmmark. What are the magnitude and direction of theelectrostatic force which acts on the charge at theorigin?

A) 0.18 N left B) 0.18 N right C) 0.36 N right D)0.36 N left

4) A foam ball of mass 0.150 g carries a charge of -2.00nC. The ball is placed inside a uniform electric field, andis suspended against the force of gravity. What are themagnitude and direction of the electricfield?

A) 735 kN/C up B) 573 kN/C up

C) 735 kN/C down D) 573 kN/C down

5) For a proton moving in the direction of the electricfield

A) its potential energy increases and its electric potentialincreases.

B) its potential energy decreases and its electric potentialincreases.

C) its potential energy increases and its electric potentialdecreases.

D) its potential energy decreases and its electric potentialdecreases.

6) The plates of a parallel-plate capacitor are maintainedwith constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the platesmust

A) remain constant.

B) increase.

C) decrease.

D) either increase or decrease. There is no way to tellfrom the information given.

7) A proton, initially at rest, is accelerated through anelectric potential difference of 500 V. What is the speed ofthe proton?

A) 9.6 x 1010 m/s B) 2.2 x 105 m/s

C) zero D) 3.1 x 105 m/s

8) A uniform electric field, with a magnitude of 500 V/m,is directed parallel to the +x axis. If the potential at x =5.0 m is 2500 V, what is the potential at x = 2.0m?

A) 1000 V B) 2000V C) 500 V D) 4000 V

9) Car batteries are rated in "amp-hours." This is ameasure of their

A) charge. B) power. C) emf. D) current.

10) The resistivity of most common metals

A) remains constant over wide temperature ranges.

B) varies randomly as the temperature increases.

C) decreases as the temperature increases.

D) increases as the temperature increases.

Explanation / Answer