Quiz about Electricity and Magnetism Final Exam

Question 1

Which of the following statements about electric charge is true?

Accepted Answer

Electrical forces act at a distance.

Answer

Objects must be touching one another to exert electrical force.

Answer

Air cannot conduct electricity; it is conducted only by solid materials.

Answer

Opposite electric charges always repel one another.

Question 2

Mr. Robinson and his class are conducting an experiment. The class needs to choose a good insulator. Which of the following could be used as an insulator?

Accepted Answer

plastic plate

Answer

silver spoon

Answer

copper wire

Answer

gold necklace

Question 3

Which of the following will increase the resistance of a wire?

Accepted Answer

increasing the temperature of the wire

Answer

using a thicker/wider wire

Answer

using a shorter wire

Answer

using silver instead of copper

Question 4

What is the current produced by a 9-volt battery flowing through a resistance of 0.2 ohms?

Accepted Answer

45 amps

Answer

1.8 amps

Answer

0.022 amps

Answer

8.8 amps

Question 5

Which two areas of physical science are closely related to the development of electric motors and generators?

Accepted Answer

D. electricity and magnetism

Answer

A. sound and light

Answer

B. electricity and sound

Answer

C. light and magnetism

Question 6

Which of the following will decrease the strength of the magnetic field around a wire?

Accepted Answer

using less loops around the iron core

Answer

increasing the current flowing through the wire

Answer

flipping the direction of the current flowing through the wire

Answer

using a larger iron core

Question 7

Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 100 amps?

Accepted Answer

1.98 V

Answer

0.000198 V

Answer

5,050 V

Answer

100.0198 V

Question 8

This contains a piece of metal that melts if it gets too hot in order to open a circuit.

Accepted Answer

fuse

Answer

conductor

Answer

insulator

Answer

circuit breaker

Question 9

What does the symbol labeled #1 represent?

Accepted Answer

light

Answer

battery

Answer

resistor

Answer

switch

Question 10

What does the symbol labeled #2 represent?

Accepted Answer

battery

Answer

light

Answer

resistor

Answer

switch

Question 11

Circuit ______ is wired in parallel, and circuit ______ is wired in series.

Accepted Answer

B. B; A

Answer

A. A; B

Question 12

Circuit ______ represents the way homes are usually wired.

Accepted Answer

B

Answer

A

Question 13

Circuit ______ is the type of circuit that causes an entire string of lights to go out when one of the bulbs burns out.

Accepted Answer

A. A

Answer

B. B

Question 14

The function of a generator is to change ____________.

Accepted Answer

mechanical energy to electrical energy

Answer

chemical energy to electrical energy

Answer

electrical energy to chemical energy

Answer

electrical energy to mechanical energy

Question 15

This exerts a force that causes other electric charges to move.

Accepted Answer

B. electrical fields

Answer

A. electrical poles

Answer

C. insulators

Answer

D. conductors

Question 16

Which circuit below contains the greatest voltage?

Accepted Answer

A circuit with a current of 25 amps and a resistance of 16 ohms

Answer

A circuit with a current of 20 amps and a resistance of 16 ohms

Answer

A circuit with a current of 10 amps and a resistance of 10 ohms

Answer

A circuit with a current of 20 amps and a resistance of 10 ohms

Question 17

What is the current of the circuit in the picture to the right?

Accepted Answer

0.6 amps

Answer

60 J

Answer

60 amps

Answer

0.6 Watts

Question 18

What process is the method by which a neutral object obtains an electrical charge from a distance?

Accepted Answer

induction

Answer

convection

Answer

conduction

Answer

radiation

Question 19

Which of the following objects would NOT be a good insulator of electric charge?

Accepted Answer

skin

Answer

wood

Answer

plastic

Answer

rubber

Question 20

Which symbol below would represent a device that can easily turn the circuit on or off?

Accepted Answer

(open switch symbol)

Answer

(V symbol)

Answer

(battery symbol)

Answer

(light bulb symbol)

Question 21

The Law of Conservation of Charge states that _____________.

Accepted Answer

charge cannot be created and destroyed but it can be transferred.

Answer

charge can be created and destroyed but NOT transferred.

Answer

charge cannot be created and destroyed and it cannot be transferred.

Answer

none of the above

Question 22

Which of the following statements is true about the circuit to the right?

Accepted Answer

There is 1 battery, 2 switches, and 3 resistors.

Answer

There are 2 batteries, 2 switches, and 2 resistors.

Answer

There are 2 batteries, 2 switches, and 3 resistors.

Answer

There are 3 batteries and 3 resistors.

Question 23

Part 3 Fill in the Blank: Fill in the blank with the most appropriate word. (2 pts each) 36. Opposite charges ________________. Like charges _______________.

Accepted Answer

attract, repel

Answer

repel, attract

Answer

combine, separate

Answer

neutralize, attract

Question 24

Electric charge flows from ____________ voltage to __________ voltage.

Accepted Answer

high, low

Answer

low, high

Answer

positive, negative

Answer

negative, positive

Question 25

To increase the current, you should __________ voltage and ______________ resistance.

Accepted Answer

increase, decrease

Answer

decrease, increase

Answer

decrease, decrease

Answer

increase, increase

Question 26

Charges can act at a distance by exerting a(n) ____________________________ which is an example of charging by ___________________.

Accepted Answer

electric field, induction

Answer

magnetic field, conduction

Answer

gravitational force, friction

Answer

current, polarization

Question 27

Lightning is created by which type of electric charge transfer?

Accepted Answer

Friction

Answer

Conduction

Answer

Induction

Answer

Radiation

Question 28

A battery works by:

Accepted Answer

Storing and releasing electrical energy through chemical reactions

Answer

Producing light energy directly

Answer

Converting sound energy to electrical energy

Answer

Absorbing heat from the environment

Question 29

Which of the following best describes a series circuit with two batteries, two resistors, a lamp, and a switch to turn the whole thing off?

Accepted Answer

A circuit where all components are connected end-to-end in a single path.

Answer

A circuit where each component is connected in parallel paths.

Answer

A circuit with only one battery and one resistor.

Answer

A circuit without a switch.

Question 30

An outlet has a current of 10 amperes and a resistance of 14 ohms. Find the voltage difference.

Accepted Answer

140 V

Answer

24 V

Answer

1400 V

Answer

1.4 V

Question 31

Which of the following diagrams best represents a parallel circuit with one battery, four lamps, switches to turn each lamp off, and a switch to turn off the entire circuit?

Accepted Answer

A diagram showing four lamps connected in parallel, each with its own switch, and a main switch controlling the battery connection.

Answer

A diagram showing four lamps connected in series with one switch for all lamps.

Answer

A diagram with four lamps in parallel but only one switch for all lamps.

Answer

A diagram with four lamps in series, each with its own switch.

Question 32

Which of the following correctly lists two differences between series and parallel circuits and provides a real-world example of each?

Accepted Answer

Series circuits have one path for current and all components share the same current; example: string of old Christmas lights. Parallel circuits have multiple paths for current and each component gets the same voltage; example: household electrical wiring.

Answer

Series circuits have multiple paths for current and each component gets the same voltage; example: household electrical wiring. Parallel circuits have one path for current and all components share the same current; example: string of old Christmas lights.

Answer

Series circuits and parallel circuits both have multiple paths for current; example: both are used in car headlights.

Answer

Series circuits and parallel circuits both have one path for current; example: both are used in household wiring.

Question 33

Find the current in a circuit with a total resistance of 9 ohms and a battery with 180 V of potential difference.

Accepted Answer

20 A

Answer

10 A

Answer

15 A

Answer

5 A

Question 34

An electromagnet is a magnet created by electric current. Which two ways can increase its strength?

Accepted Answer

Increase the current and add more coils of wire

Answer

Decrease the current and use a thinner wire

Answer

Use a wooden core and reduce the number of coils

Answer

Decrease the voltage and use fewer coils

Question 35

One way to keep a house from overheating is:

Accepted Answer

Opening windows at night

Answer

Turning on all the lights

Answer

Keeping all doors closed

Answer

Using a heater

Question 36

Ferromagnetism is a phenomenon where:

Accepted Answer

Electrons in atoms align their spins in the same direction, resulting in strong magnetic properties.

Answer

Electrons in atoms pair up and cancel each other's magnetic fields, resulting in no magnetism.

Answer

Electrons move randomly, causing weak and temporary magnetism.

Answer

Electrons are lost from the atom, creating a positive ion.

Question 37

What particle has a negative charge?

Accepted Answer

Electrons

Answer

Protons

Answer

Neutrons

Answer

Atoms

Question 38

Which of the following describes an object that must have a net negative charge?

Accepted Answer

It contains more electrons than protons.

Answer

It contains more molecules than atoms.

Answer

It is carrying an electric current.

Answer

It is made of metal.

Question 39

What is a coulomb?

Accepted Answer

Unit of charge

Answer

Unit of energy

Answer

Unit of current

Answer

Unit of voltage.

Question 40

Why are electrical cords covered in plastic or rubber?

Accepted Answer

because plastic and rubber are insulators which keeps us safe

Answer

because it looks nicer

Answer

because plastic and wire help conduct electricity

Answer

because wires are color coded based on voltage

Question 41

A series circuit will continue to work if one of the light bulbs is unscrewed.

Accepted Answer

false

Answer

true

Question 42

This is an example of what type of circuit?

Accepted Answer

parallel

Answer

simple

Answer

series

Question 43

What is the purpose of a switch in an electric circuit?

Accepted Answer

to allow the circuit to be opened or closed

Answer

to change the direction of the current

Answer

to provide a push for the current

Answer

to increase the electric power to the load

Question 44

What is part C considered in the circuit?

Accepted Answer

load/resistor

Answer

power source

Answer

conductor

Question 45

What is the device shown?

Accepted Answer

Solenoid

Answer

Electromagnet

Answer

Generator

Answer

Motor

Question 46

The Right Hand Rule says that if you hold a wire in your right hand and point your thumb in the direction of the ______ current, the direction that your fingers curl is the direction of the _______.

Accepted Answer

Positive, Magnetic Field

Answer

Positive, Current

Answer

Negative, Magnetic Field

Answer

Negative, Current

Question 47

___, ____, and ____ are magnetic metals.

Accepted Answer

Iron, Nickel, Cobalt

Answer

Copper, Chromium, Gadolinium

Answer

Aluminum, Iron, Copper

Answer

Cobalt, Mercury, Sodium

Question 48

Which three materials would allow you to build an electromagnet?

Accepted Answer

Battery, Wire, Nail

Answer

Battery, Tape, Paper

Answer

Wire, Nail, Paper Clip

Answer

Sandpaper, Tape, Wire

Question 49

What unit is used to measure current?

Accepted Answer

Amps

Answer

Ohms

Answer

Omega

Answer

Volts

Question 50

What is the current in a circuit with 6 ohms of resistance and a battery containing 24 Volts?

Accepted Answer

4 A

Answer

1/4 A

Answer

144 A

Answer

0.4 A

Question 51

What is Resistance?

Accepted Answer

The ability to reduce the flow of electrons

Answer

The flow of electrons

Answer

Electric potential difference

Answer

A battery

Question 52

This circuit has a 24 volt battery and the resistor is 8 ohms. How many amps are running through the circuit?

Accepted Answer

3 Amps

Answer

192 Amps

Answer

2 Amps

Answer

4 Amps

Question 53

What is the formula for ohms law?

Accepted Answer

V =I x R

Answer

1+2=3

Answer

R X E = I

Answer

E= MC squared

Question 54

If the Voltage stays the same and Resistance is increased, Current will

Accepted Answer

Decrease

Answer

Increase

Answer

Stay the same

Answer

X

Question 55

If lamp 1 is unscrewed from its holder, what will happen to lamp 2?

Accepted Answer

It will go out

Answer

It will get brighter

Answer

It will stay the same brightness

Answer

Nothing will happen

Question 56

What is the total resistance in this series circuit?

Accepted Answer

$$9\ \Omega$$

Answer

$$3\ \Omega$$

Answer

$$1\ \Omega$$

Question 57

The direction of electric current flows from the _____ end of the battery to the _____ end of the battery

Accepted Answer

positive, negative

Answer

negative, negative

Answer

negative, positive

Question 58

An inflated balloon has been rubbed against a person's hair and is touched to a neutral wall and remains attached. Which diagram best represents the charge distribution on the balloon and the wall?

Accepted Answer

Option B is correct

Answer

A.

Answer

C.

Question 59

After being rubbed on a sweater, a balloon has a higher number of electrons than protons on its surface. What type of charge does the balloon have?

Accepted Answer

A negative charge.

Answer

A positive charge.

Answer

A neutral charge

Answer

No charge at all

Electricity and Magnetism Final Exam

61 questions