Statics Test Practice

In the diagram below, a negatively charged rod is placed between, but does not touch, identical small metal spheres R and S hanging from insulating threads.

What can be concluded if the rod repels sphere R but attracts sphere S?

• Sphere R must be negative and sphere S must be positive.

• Sphere R must be negative and sphere S may be positive or neutral.

• Sphere R must be positive and sphere S must be negative.

• Sphere R must be positive and sphere S may be negative or neutral.

Tags

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Which diagram best represents the electric field of a point charge?

• A

• B

• C

• D

Tags

NGSS.HS-PS3-5

As a student runs a plastic comb through her hair, the comb acquires a negative electric charge. This charge results from the transfer of

• protons from the comb to her hair

• protons from her hair to the comb

• electrons from the comb to her hair

• electrons from her hair to the comb

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

An electrostatic force exists between two +3.20×10^−19-coulomb point charges separatedby a distance of 0.030 meter. As the distance between the two point charges is decreased, the electrostatic force of

• attraction between the two charges decreases

• attraction between the two charges increases

• repulsion between the two charges decreases

• repulsion between the two charges increases

Tags

NGSS.HS-PS2-4

A glass rod is rubbed with silk. During this process, a positive charge is given to the glass rod by

• adding electrons to the rod

• adding protons to the rod

• removing electrons from the rod

• removing protons from the rod

Which quantity of excess electric charge could be found on an object?

• 6.25 × 10^-19 C

• 4.80 × 10^-19 C

• 6.25 elementary charges

• 1.60 elementary charges

Tags

NGSS.HS-PS3-5

A metal sphere, X, has an initial net charge of −6 × 10⁻⁶ coulomb and an identical sphere, Y, has an initial net charge of +2 × 10⁻⁶ coulomb. The spheres touch each other and then separate. What is the net charge on sphere X after the spheres have separated?

• 0 C

• −2 × 10−6 C

• −4 × 10−6 C

• −6 × 10−6 C

Tags

NGSS.HS-PS2-4

The diagram below shows the electric field in the vicinity of two charged conducting spheres, A and B. What is the static electric charge on each of the conducting spheres?

• A is positive and B is negative.

• Both A and B are positive.

• Both A and B are negative.

• A is negative and B is positive

Tags

NGSS.HS-PS2-4

The electroscope shown in the diagram below is made completely of metal and consists of a knob, a stem, and leaves. A positively charged rod is brought near the knob of the electroscope and then removed. The motion of the leaves results from electrons moving from the

• leaves to the knob only

• knob to the leaves

• leaves to the knob and then back to the leaves

• knob to the leaves and then back to the knob

Tags

NGSS.MS-PS2-3

What is the intensity of the electric field relative to locations A, B, and C?

• the same at A, B, and C

• greater at B than at C

• greater at C than at A

• greater at A than at B

Tags

NGSS.HS-PS3-5

NGSS.HS-PS2-5