Quiz about S8P5 Electricity & Magnetism Review

Question 1

How would the gravitational force between Earth and the Moon change if the distance between the two objects doubled, but all other factors stayed the same?

Accepted Answer

The gravitational force between Earth and the Moon would decrease by a proportional amount.

Answer

The gravitational force between Earth and the Moon would increase by a proportional amount.

Answer

The gravitational force between Earth and the Moon would completely disappear.

Answer

The gravitational force between Earth and the Moon would remain constant.

Question 2

A student claims that gravitational fields exist between objects that are not in contact with each other. She creates a diagram of two figures. The width of the arrows in Figure A and Figure B represent the strength of the gravitational attraction between two objects. The student claims the gravitational force is greater between the objects in Figure A. Which argument best supports her claim?

Accepted Answer

The distance between the objects in Figure A is shorter than the distance between the objects in Figure B.

Answer

The masses of the objects in Figure A are less than the masses of the objects in Figure B.

Answer

The diameters of the objects in Figure A are greater than the diameters of the objects in Figure B.

Answer

The surface area of the larger object in Figure A is greater than the surface area of the larger object in Figure B.

Question 3

Use the diagram below of spheres at varying distances apart to answer the question that follows. Which of the diagrams shows the least gravitational force?

Accepted Answer

IV

Answer

I

Answer

II

Answer

III

Question 4

The law of conservation of charge states that:

Accepted Answer

electric charge is not created or destroyed only transferred from object to object

Answer

charge is not created or destroyed or transferred from object to object

Answer

the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change

Answer

charge can be created and destroyed but cannot be transferred

Question 5

Use the table below to answer this question.

Accepted Answer

As the distance between the objects increases, the size of the electric force decreases

Answer

As the distance between the objects increases, the objects become more positively charged.

Answer

The size of the electric force is constant.

Answer

As the size of the objects increases, the size of the electric force between them decreases.

Question 6

What is the difference between charging by conduction and charging by induction?

Accepted Answer

During conduction, charges move between touching objects; during induction, charges are rearranged within an object that is near another object.

Answer

During conduction, charges move between objects that briefly touch; during induction, charges move between objects that are rubbed together.

Answer

During induction, charges move between objects that briefly touch; during conduction, charges move between objects that are rubbed together.

Answer

During induction, charges move between touching objects; during conduction, charges are rearranged within an object that is near another object

Question 7

In which arrangement of magnets will all the magnets attract?

Accepted Answer

Arrangement b

Answer

Arrangement a

Answer

Arrangement c

Answer

Arrangement d

Question 8

The Sun is the center of our solar system, which includes planets, dwarf planets, asteroids, and comets. Which statement best explains why all objects, including planets, orbit the Sun, instead of the Sun orbiting one or more planets?

Accepted Answer

Planets have less mass than the Sun.

Answer

The Sun rotates faster than any of the planets.

Answer

The Sun formed before the planets or other objects.

Answer

Planets are further from the center of the solar system.

Question 9

The table below shows Herman's mass and the mass of different plants in our solar system. If Herman were to stand on each plant, which list correctly orders the planets from most gravitational force to least gravitational force?

Accepted Answer

Earth, Mars, Venus

Answer

Earth, Venus, Mars

Answer

Venus, Mars, Earth

Answer

Venus, Earth, Mars

Question 10

A student claims that a magnetic field can affect objects that are not in direct contact with each other. Which argument best supports the students' claim?

Accepted Answer

A compass needle points to the north from any location.

Answer

A ball rolls downhill and eventually comes to a stop.

Answer

A light bulb becomes hot to the touch after being lit.

Answer

A lightning bolt releases a charge from the sky to the ground.

Question 11

Electrical wires sometimes have a plastic coating wrapped around them. How does this make the wires safer to handle?

Accepted Answer

Plastic is a good insulator.

Answer

Plastic does not react chemically with air.

Answer

Plastic is smooth and not easily frayed.

Answer

Plastic will melt if the wires overheat.

Question 12

A circuit contains four light bulbs. One light bulb goes out but the other three stays lit. This must be a(n) ________ circuit.

Accepted Answer

parallel

Answer

closed

Answer

open

Answer

series

Question 13

The table above compares the conductivity of several materials. Which of these materials should you use to BEST prevent electrons from flowing easily?

Accepted Answer

wood

Answer

germanium

Answer

silver

Answer

copper

Question 14

A material in which electrons are able to move easily or freely is a(n) ________.

Accepted Answer

conductor

Answer

insulator

Answer

electric field

Answer

none of these

Question 15

What term below best describes the circuit pictured?

Accepted Answer

open

Answer

alternating current

Answer

closed

Answer

parallel

Question 16

What is the main difference between a generator and a motor?

Accepted Answer

Generator - mechanical energy to electrical energy Motor - electrical energy to mechanical energy

Answer

Generator - electrical energy to mechanical energy

Answer

Motor - mechanical energy to electrical energy

Answer

They are the same machine.

Question 17

Juanita made an electromagnet by placing an iron bar inside a coil of wire and then running current through the wire. After awhile, she turned off the current. What happened to the bar?

Accepted Answer

The bar immediately lost its magnetism.

Answer

The bar continued to be magnetic forever.

Answer

The bar's magnetism became weaker over a long time.

Answer

The bar remained magnetic, but only at the poles.

Question 18

Isabella makes an electromagnet by wrapping copper wire around an iron bolt and then connecting each end of the wire to a battery. She observes that the more times that she wraps the copper wire around the bolt, the more paper clips her magnet can pick up. What does she conclude in this experiment?

Accepted Answer

Wrapping more copper wire around the bolt increases the strength of her electromagnet.

Answer

Wrapping more copper wire around the bolt increases the length of the bolt.

Answer

Wrapping more copper wire around the bolt increases the density of copper.

Answer

Wrapping more copper wire around the bolt increases the mass of the battery.

Question 19

In an investigation, what happens to the magnetic force between two objects if they are moved farther apart?

Accepted Answer

The force decreases.

Answer

The force increases.

Answer

The force remains the same.

Answer

The force disappears completely.

Question 20

A student wants to increase the magnetic force between two bar magnets. What should the student do?

Accepted Answer

Move the magnets closer together.

Answer

Move the magnets farther apart.

Answer

Make the positive poles face each other.

Answer

Make the negative poles face each other.

Question 21

A mechanic dropped a bolt he needed to repair a car motor. He decided to make a simple electromagnet to try to attract the metal bolt. Which list of material would make the best electromagnet?

Accepted Answer

metal rod for a core, copper wire, 9-volt battery

Answer

glass rod for a core, copper wire, 9-volt battery

Answer

plastic rod for a core, copper wire, 9-volt battery

Answer

wooden rod for a core, copper wire, 9-volt battery

Question 22

Mr. Chromar's science class built an electromagnet with a metal rod, a wire, and a battery. The day they built it, the electromagnet worked. The next day it did not work. What is the best explanation as to why the electromagnet did not work?

Accepted Answer

The battery was drained.

Answer

The circuit was closed.

Answer

The wire wouldn't conduct electricity.

Answer

The battery wouldn't conduct electricity.

Question 23

Greg built a simple electromagnet with copper wire, an iron bolt, and a 1.5-volt battery. The electromagnet was able to lift a paper clip from 3 centimeters away. Which of the following is NOT a way Greg can improve the strength of his electromagnet?

Accepted Answer

He can reverse the orientation of the battery.

Answer

He can use a thicker piece of copper wire.

Answer

He can replace the 1.5-volt battery with a battery of higher voltage.

Answer

He can use a longer piece of wire that wraps more times around the bolt.

Question 24

Read the passage about Andreas. Andreas has to make an electromagnet in his science class. He was only given a nail, copper wire, and a 9-volt battery. The assignment was to make a magnet strong enough to pick up paper clips. His teacher decided to make the assignment into a competition to see who could pick up the most clips. What can Andreas do to his magnet to make sure he wins by picking up the most paper clips?

Accepted Answer

Andreas can wrap many coils of the wire, close together, around the nail.

Answer

Andreas can wrap few coils of the wire, far apart, around the nail.

Answer

Andreas can wrap many coils of the wire, far apart, around the nail.

Answer

Andreas can wrap few coils of the wire, close together, around the nail.

Question 25

How can the materials in the diagram be used to make a magnet?

Accepted Answer

touch the ends of the wire to the ends of the battery

Answer

replace the iron nail with a wood rod

Answer

add more loops of wire to the iron nail

Answer

place the nail closer to the iron filings

S8P5 Electricity & Magnetism Review

25 questions

How would the gravitational force between Earth and the Moon change if the distance between the two objects doubled, but all other factors stayed the same?

Use the diagram below of spheres at varying distances apart to answer the question that follows. Which of the diagrams shows the least gravitational force?

The law of conservation of charge states that:

Use the table below to answer this question.

What is the difference between charging by conduction and charging by induction?

In which arrangement of magnets will all the magnets attract?

The Sun is the center of our solar system, which includes planets, dwarf planets, asteroids, and comets. Which statement best explains why all objects, including planets, orbit the Sun, instead of the Sun orbiting one or more planets?

The table below shows Herman's mass and the mass of different plants in our solar system. If Herman were to stand on each plant, which list correctly orders the planets from most gravitational force to least gravitational force?

A student claims that a magnetic field can affect objects that are not in direct contact with each other. Which argument best supports the students' claim?

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