Physics: Chapter 19 Test

the electrical force experienced by the hydrogen nucleus is to the left, and the magnitude is equal to the force exerted on the carbon nucleus

A hydrogen nucleus, which has a charge +e, is situated to the left of a carbon nucleus, which has a charge +6e. Which statement is true?

is repelled by the sphere

A plastic rod is charged up by rubbing a wool cloth, and brought to an initially neutral metallic sphere that is insulated from ground. It is allowed to touch the sphere for a few seconds, and then is separated from the sphere by a small distance. After the rod is separated, the rod

they are closer to the initial position of the proton that to the initial position of the electron

An electron and a proton are released simultaneously from rest and start moving toward each other due to their electrostatic attraction, with no other forces present. Which of the following statements are true just before they are about to collide? (there could be more than one correct choice)

A

Four point charges of equal magnitudes but with varying signs are arranged on three of the corners and at the center of the square of side d as shown in the figure. Which one of the arrows shown represents the net force acting on the center charge? (three sides -Q, center +Q)

A

Four points charges of equal magnitudes but with varying signs are arranged on three of the corners and at the center of the square of side d as shown in the figure. Which one of the arrows shown represents the net force acting on the center charge? (left, right, and center +Q, bottom -Q)

4.38 x 10^13

If a charge generator builds a negative static charge of -7.00 microC, how many electrons are transferred to it during this process.

it will move with decreasing is acceleration

In outer space, a positive charge q is released near a positive fixed charge Q, what is true about the motion of q?

B

Three equal charges +Q are at three of the corners of a square of side d. A fourth charge +Q of equal magnitude is at the center of the square as shown in the figure. Which one of the arrows shown represents the net force acting on the charge at the center of the square?

0.189 N

Three point charges are located on the x-axis at the following positions: Q1 = +2.00 microC is at x = 1.00m, Q2 = +3.00 microC is at x = 0.00, and Q3 = -5.00 microC is at x = -1.00 m. What is the magnitude of the electric force on Q2?

1/16 N

Two point charges each experience a 1-N electrostatic force when they are 2 cm apart. If they are moved to a new separation of 8 cm, what is the magnitude of the electric force on each of them?

neutral

What charge does a neutron have?

positive

What charge does a proton have?

negative

What charge does an electron have?

9.6 x 10^7 C

What is the charge on 1.0 kg of protons?

1.25 x 10^13

A piece of plastic has a net charge of +2.00 microC. How many protons does this piece of plastic have?

true

Opposite charges will attract

it remains the same

Two point charges, q1 and q2, are separated by a distance R. If the magnitudes of both charges are halved and their separation is also halved, what happens to the electrical force that each charge exerts on the other one?

true

Electrically neutral objects cannot exert an electrical force on each other, but they can exert a gravitational force on each other.

6.3 x 10^18

How many electrons are necessary to produce 1.0 C of negative charge?

3.12 m

The force of attraction that a -40.0 microC point charge exerts on a +108 microC point charge has magnitude 4.00 N. How far apart are these two charges?

2.4 x 10^-8 C

Two tiny particles carrying like charges of the same magnitude are 0.001 m apart. If the electric force on one of them is 5.0 N, what is the magnitude of the charge on each of these particles?

false

like charges will attract