Electrostatics Answers

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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?

Label 1: XLabel 2: Y

Label 1: ZLabel 2: X

Label 1: XLabel 2: Z

Label 1: ZLabel 2: Z

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Which pair does NOT have an electric force between them?

a positive object and negative object

two positive objects

two neutral objects

two negative objects

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

a metallic conductor lacking free electrons surrounded by a rubber insulator with free electrons

a metallic conductor with free electrons surrounded by a rubber insulator lacking free electrons

a metallic insulator with free electrons surrounded by a rubber conductor lacking free electrons

a metallic insulator lacking free electrons surrounded by a rubber conductor with free electrons

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

away from each charge and meeting in the middle

away from each charge and curving away from one another

away from the positive charge and toward the negative charge

away from the negative charge and toward the positive charge

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.

It models induction because an electron (a flower) transfers from Cato to Marta through direct contact.

It models friction because an electron (a flower) transfers from Cato to Marta through direct contact.

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.

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.

Through which element would someone most likely receive a shock?

iodine (I)

sulfur (S)

phosphorus (P)

chromium (Cr)

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

through friction between her hand and the doorknob

through friction between her feet and the carpet

through conduction between her hand and the doorknob

through conduction between her feet and the carpet

How does a rubber rod become negatively charged through friction?

It touches a negatively charged object, and protons move off of the rod.

It touches a positively charged object, and electrons move onto the rod.

It is rubbed with another object, and electrons move onto the rod.

It is rubbed with another object, and protons move off of the rod.

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?

1.6 × 10–7 C

2.5 × 10–3 C

2.8 × 10–3 C

3.5 × 101 C

A material that restricts the flow of electricity or thermal energy is a(n) .

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