Chapter 3

Question 1

What is static electricity?

Answer 1

Static electricity is the accumulation of electric charge on the surface of objects.

Question 2

True or False: Conductors allow electric charge to flow through them easily.

Answer 2

True

Question 3

Fill in the blank: Materials that do not conduct electricity are called __________.

Answer 3

insulators

Question 4

Which of the following is a good conductor of electricity? A) Wood B) Copper C) Rubber

Answer 4

B) Copper

Question 5

What happens when two objects with static charge come into contact?

Answer 5

They can transfer charge, potentially resulting in an electric shock.

Question 6

Define ‘magnetism’.

Answer 6

Magnetism is a physical phenomenon produced by the motion of electric charge, resulting in attractive and repulsive forces between objects.

Question 7

True or False: Insulators can hold static charges for long periods.

Answer 7

True

Question 8

Which of the following describes a non-contact force? A) Gravity B) Friction C) Tension

Answer 8

A) Gravity

Question 9

What type of charge do electrons carry?

Answer 9

Negative charge

Question 10

Fill in the blank: The flow of electric charge is known as __________.

Answer 10

electric current

Question 11

True or False: All materials can be classified as either conductors or insulators.

Answer 11

False

Question 12

What is induced charge?

Answer 12

Induced charge is the redistribution of electric charge in an object due to the influence of a nearby charged object.

Question 13

Choose the correct answer: A negatively charged object has A) More protons than electrons B) More electrons than protons C) Equal protons and electrons

Answer 13

B) More electrons than protons

Question 14

True or False: Magnetic fields can exist without electric fields.

Answer 14

False

Question 15

What is the primary purpose of an insulator in electrical applications?

Answer 15

To prevent the unintended flow of electric current.

Question 16

What is a semiconductor?

Answer 16

A material that has electrical conductivity between that of a conductor and an insulator.

Question 17

What is the unit of electric current?

Answer 17

Ampere

Question 18

True or False: Electrons carry a positive charge.

Answer 18

False

Question 19

Fill in the blank: A device used to measure electric current is called an ______.

Answer 19

Ammeter

Question 20

What is the symbol for a battery in a circuit diagram?

Answer 20

Two parallel lines, one longer than the other

Question 21

What is the flow of electric charge called?

Answer 21

Electric current

Question 22

Multiple Choice: Which of the following components stores electrical energy? A) Ammeter B) Battery C) Resistor D) Switch

Answer 22

B) Battery

Question 23

What do we call a single electrochemical cell that produces voltage?

Answer 23

Cell

Question 24

What does an ammeter measure?

Answer 24

The flow of electric current in a circuit

Question 25

What is the unit of electric current?

Answer 25

Ampere

Question 26

True or False: Voltage is the measure of electric current in a circuit.

Answer 26

False

Question 27

Fill in the blank: The potential difference between two points is measured in ______.

Answer 27

Volts

Question 28

What instrument is used to measure voltage?

Answer 28

Voltmeter

Question 29

Multiple choice: Which of the following measures electric current? A) Voltmeter B) Ammeter C) Ohmmeter

Answer 29

B) Ammeter

Question 30

True or False: An electron has a positive charge.

Answer 30

False

Question 31

What is the potential difference across a circuit when no current is flowing?

Answer 31

Zero volts

Question 32

Short answer: What does an ammeter measure?

Answer 32

Electric current

Question 33

Fill in the blank: The unit of potential difference is called a ______.

Answer 33

Volt

Question 34

Multiple choice: Which of the following correctly describes current? A) Flow of electrons B) Flow of protons C) Flow of neutrons

Answer 34

A) Flow of electrons

Question 35

What is the definition of electric current?

Answer 35

The flow of electric charge

Question 36

True or False: Voltage can exist without current.

Answer 36

True

Question 37

What is the primary function of a voltmeter?

Answer 37

To measure the voltage across two points in an electrical circuit.

Question 38

True or False: A voltmeter should be connected in series with a circuit to measure voltage.

Answer 38

False

Question 39

Fill in the blank: The internal resistance of a voltmeter is designed to be __________ to avoid affecting the circuit being measured.

Answer 39

high

Question 40

In a series circuit, how does the total voltage relate to the individual voltages across components?

Answer 40

The total voltage is the sum of the individual voltages across each component.

Question 41

What is the effect of connecting voltmeters in parallel with resistors?

Answer 41

It allows for accurate measurement of voltage without altering the circuit significantly.

Question 42

What is the unit of electrical resistance?

Answer 42

Ohms

Question 43

What is a particle that carries an electric charge?

Answer 43

Electron

Question 44

Materials that allow the flow of electric current are known as _______.

Answer 44

Conductors

Question 45

Materials that do not allow the flow of electric current are known as _______.

Answer 45

Insulators

Question 46

What type of force does not require contact to act?

Answer 46

Non-contact force

Question 47

What is the term for when two magnetic objects pull toward each other?

Answer 47

Attract

Question 48

What is the term for when two magnetic objects push away from each other?

Answer 48

Repel

Question 49

What is the term used to describe the alignment of magnetic domains in a material?

Answer 49

Domain

Question 50

Name one ferromagnetic material.

Answer 50

Iron

Question 51

Name another ferromagnetic material besides iron.

Answer 51

Cobalt

Question 52

Name a third ferromagnetic material.

Answer 52

Nickel

Question 53

What is the force exerted by magnets called?

Answer 53

Magnetic force

Question 54

What surrounds a magnet and shows the direction of magnetic force?

Answer 54

Magnetic field

Question 55

What is the name of the pole of a magnet that points toward the Earth's North?

Answer 55

North pole

Question 56

What is the name of the pole of a magnet that points toward the Earth's South?

Answer 56

South pole

Question 57

What are the lines that represent magnetic fields called?

Answer 57

Field lines

Question 58

What component in a circuit limits the flow of current?

Answer 58

Resistor

Question 59

What type of resistor allows for variable resistance?

Answer 59

Variable resistor

Question 60

What part of a light bulb heats up to produce light?

Answer 60

Filament

Question 61

What is the potential energy difference that drives current in a circuit?

Answer 61

Voltage

Question 62

The difference in electric potential energy per charge is known as _______.

Answer 62

Potential difference

Question 63

What is the flow of electric charge in a circuit called?

Answer 63

Current

Question 64

What is the gaseous state of a substance referred to as?

Answer 64

Vapour

Question 65

What device uses electricity to create a magnetic field?

Answer 65

Electromagnet

Question 66

What is typically placed in the center of an electromagnet to enhance its strength?

Answer 66

Iron core

Question 67

What part of a machine converts electrical energy into mechanical energy?

Answer 67

Armature

Question 68

What is a device that automatically interrupts the flow of current in a circuit called?

Answer 68

Circuit breaker