Answers3262 CR Physics B 2526Unit Test

Electrostatics Answers

10 verified answers
1
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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
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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
3

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.
4

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
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

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
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

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Electrostatics Answers — 3262 CR Physics B 2526