AnswersCrowley Credit Recovery Physics BUnit Test

Electrostatics Answers

10 verified answers1 views
1
Free Preview

How does charging by conduction occur?

A
A charged object is brought near a neutral object without touching it.
B
A neutral object touches another neutral object.
C
A charged object touches a neutral object.
D
A neutral object is brought near another neutral object without touching it.
2
Free Preview

What is the value of the charge that experiences a force of 2.4 × 10–3 N in an electric field of 6.8 × 10–5 N/C?

A
1.6 × 10–7 C
B
2.5 × 10–3 C
C
2.8 × 10–3 C
D
3.5 × 101 C
4

What is the electric potential energy of a charge that experiences a force of 3.6 × 10–4 N when it is 9.8 × 10–5 m from the source of the electric field?

A
3.5 × 10–8 J
B
4.6 × 10–4 J
C
2.7 × 10–1 J
D
3.7 × 100 J
5

How do the charges compare when two objects are charged through friction?

A
The objects become oppositely charged and have equal amounts of charge.
B
The objects become positively charged and have equal amounts of charge.
C
The objects become negatively charged and have different amounts of charge.
D
The objects become oppositely charged and have different amounts of charge.
6

Tracy scuffs her socked feet across a carpet. When she touches a doorknob, she gets a small shock.How did Tracy become charged?

A
through friction between her hand and the doorknob
B
through friction between her feet and the carpet
C
through conduction between her hand and the doorknob
D
through conduction between her feet and the carpet
7

Which best describes the materials that make up an electrical cord?

A
a metallic conductor lacking free electrons surrounded by a rubber insulator with free electrons
B
a metallic conductor with free electrons surrounded by a rubber insulator lacking free electrons
C
a metallic insulator with free electrons surrounded by a rubber conductor lacking free electrons
D
a metallic insulator lacking free electrons surrounded by a rubber conductor with free electrons
8

Jason makes a graphic organizer for insulators and conductors and wants to add the following labels to it.Label 1: Lacks free electronsLabel 2: AluminumIn which regions should Jason place each label?

Question illustration
A
Label 1: XLabel 2: Y
B
Label 1: ZLabel 2: X
C
Label 1: XLabel 2: Z
D
Label 1: ZLabel 2: Z
9

A charge of 6.4 × 10–7 C experiences an electric force of 1.8 × 10–1 N. What is the electric field strength?

A
1.1 × 10–7 N/C
B
3.6 × 10–6 N/C
C
8.2 × 100 N/C
D
2.8 × 105 N/C
10

The area around a charged object that can exert a force on other charged objects is a(n) _________.

A
electric field
B
field line
C
conductor
D
electric potential energy
11

Marta, Cato, and Juan plan a skit to illustrate one of the methods of charging.Marta and Cato are walking together. Each has one flower and one box of candy. Juan offers Cato a huge bouquet of flowers, but Cato can’t take it because his hands are full.Cato hands his flower to Marta and then turns to Juan to take the bouquet.Marta walks away in one direction with two flowers and one box of candy. Juan keeps the bouquet and walks away in the other direction. Cato looks sad standing alone with only a box of candy.

A
It models induction because an electron (a flower) transfers from Cato to Marta through direct contact.
B
It models friction because an electron (a flower) transfers from Cato to Marta through direct contact.
C
It models friction because the offer of flowers represents a charged object that causes an electron (a flower) to transfer from one object to another.
D
It models induction because the offer of flowers represents a charged object that causes an electron (a flower) to transfer from one object to another.
12

What is the value of the charge that experiences a force of 2.4 × 10–3 N in an electric field of 6.8 × 10–5 N/C?

A
1.6 × 10–7 C
B
2.5 × 10–3 C
C
2.8 × 10–3 C
D
3.5 × 101 C
13

A positive rod is placed to the left of sphere A, and the spheres are separated.

Question illustration
A
Sphere A is negative and sphere B is positive because protons from sphere A are attracted to the rod and move to sphere B.
B
Sphere A is negative and sphere B is positive because electrons from sphere B are attracted to the rod and move to sphere A.
C
Sphere A is positive and sphere B is negative because electrons from the rod move to sphere B and protons then move to sphere A.
D
Sphere A is positive and sphere B is negative because protons move from sphere B to the rod and also to sphere A.
14

Through which element would someone most likely receive a shock?

A
iodine (I)
B
sulfur (S)
C
phosphorus (P)
D
chromium (Cr)
15

Kiki makes a table to compare the particles in a magnesium atom to those in a magnesium ion.She knows that a magnesium ion has an electric field that points away from the ion. What values should she use to complete her table?

Question illustration
A
X: 14Y: 12Z: 12
B
X: 12Y: 12Z: 10
C
X: 12Y: 10Z: 12
D
X: 12Y: 12Z: 14
16

Which pair does NOT have an electric force between them?

A
a positive object and negative object
B
two positive objects
C
two neutral objects
D
two negative objects
17

Moira is drawing the electric field lines around a pair of charges. One charge is positive, and the other charge is negative.

Question illustration
A
away from each charge and meeting in the middle
B
away from each charge and curving away from one another
C
away from the positive charge and toward the negative charge
D
away from the negative charge and toward the positive charge
18

A charge of 8.5 × 10–6 C is in an electric field that has a strength of 3.2 × 105 N/C. What is the electric force acting on the charge?

A
0.27 N
B
2.7 N
C
27 N
D
270 N

Did you find these answers helpful?

More from this Course

Quiz
42 verified answers

Unit Test

Quiz
9 verified answers

Coulomb's Law

Quiz
19 verified answers

Wave Interactions