Slide 3 (Answer) / 38 1 Which of the following is NOT an example of - - PDF document

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8th Grade

Types of Interactions Study Guide

2015-08-26 www.njctl.org

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1 Which of the following is NOT an example of a force being exerted through a field? A Gravity pulling on a falling apple B A man pushing a car C A magnet attracting a steel ball D An electrically charged balloon pushing on another balloom from across the room

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1 Which of the following is NOT an example of a force being exerted through a field? A Gravity pulling on a falling apple B A man pushing a car C A magnet attracting a steel ball D An electrically charged balloon pushing on another balloom from across the room

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Answer

B

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2 Unbalanced forces acting on an object will cause it to accelerate (chance velocity). True False

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2 Unbalanced forces acting on an object will cause it to accelerate (chance velocity). True False

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Answer

True

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3 The force of gravity ___ as the object's mass decreases. A increases B remains constant C decreases

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3 The force of gravity ___ as the object's mass decreases. A increases B remains constant C decreases

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Answer

C

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4 The force of gravity _________ as the distance between two objects decreases.

A

Increases

B

Remains Constant

C

Decreases

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4 The force of gravity _________ as the distance between two objects decreases.

A

Increases

B

Remains Constant

C

Decreases

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Answer

A

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5 The force of gravity decreases at a constant rate as we move away from a planet like Jupiter. True False

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5 The force of gravity decreases at a constant rate as we move away from a planet like Jupiter. True False

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Answer

False

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6 As we move away from the Sun, the force of gravity gets weaker by an inverse of:

A

distance cubed

B

distance

C

distance squared

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6 As we move away from the Sun, the force of gravity gets weaker by an inverse of:

A

distance cubed

B

distance

C

distance squared

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Answer

C

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7 What makes a balloon exhibit an overall positive charge? A Equal protons and electrons in the object B More electrons than protons in the object C More protons than electrons in the object D Less electrons in the object

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7 What makes a balloon exhibit an overall positive charge? A Equal protons and electrons in the object B More electrons than protons in the object C More protons than electrons in the object D Less electrons in the object

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Answer

C

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8 What makes an object exhibit a overall negative charge?

A

equal protons and electrons in the object

B

more electrons than protons in the object

C

more protons than electrons in the object

D

less electrons in the object

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8 What makes an object exhibit a overall negative charge?

A

equal protons and electrons in the object

B

more electrons than protons in the object

C

more protons than electrons in the object

D

less electrons in the object

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Answer

B

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9 What makes an object exhibit an overall neutral charge?

A

equal protons and electrons in the object

B

more electrons than protons in the object

C

more protons than electrons in the object

D

less electrons in the object

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9 What makes an object exhibit an overall neutral charge?

A

equal protons and electrons in the object

B

more electrons than protons in the object

C

more protons than electrons in the object

D

less electrons in the object

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Answer

A

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10 Opposite charges repel. True False

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10 Opposite charges repel. True False

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Answer

False

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11 Like charges attract. True False

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11 Like charges attract. True False

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Answer

False

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12 As the amount of charge decreases, the electric force between the charges ___. A decreases B remains constant C increases

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12 As the amount of charge decreases, the electric force between the charges ___. A decreases B remains constant C increases

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Answer

A

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13 As the amount of distance between charges decreases, the force between the charges ___. A decreases B remains constant C increases

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13 As the amount of distance between charges decreases, the force between the charges ___. A decreases B remains constant C increases

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Answer

C

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14 Electric field lines exit positive charges and enter negative charges. True False

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14 Electric field lines exit positive charges and enter negative charges. True False

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Answer

True

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15 The electric field strength between two parallel

• ppositely charged plates:

A increases as you move towards the positive plate. B decreases as you move towards the negative plate. C remains constant at all points between the plates.

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15 The electric field strength between two parallel

• ppositely charged plates:

A increases as you move towards the positive plate. B decreases as you move towards the negative plate. C remains constant at all points between the plates.

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Answer

C

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16 William Gilbert was the scientist who discovered that the Earth was a giant magnet. True False

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16 William Gilbert was the scientist who discovered that the Earth was a giant magnet. True False

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Answer

True

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17 Microscopic regions inside iron are called ___. A magnetic crystals B magnetic domains C magnetic atoms

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17 Microscopic regions inside iron are called ___. A magnetic crystals B magnetic domains C magnetic atoms

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Answer

B

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18 Ferromagnetic substances include: (select all that are ferromagnetic) A iron B aluminum C nickel D cobalt

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18 Ferromagnetic substances include: (select all that are ferromagnetic) A iron B aluminum C nickel D cobalt

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Answer

A, C, D

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19 An electromagnet produces a magnetic field when current flows through it. True False

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19 An electromagnet produces a magnetic field when current flows through it. True False

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Answer

True

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20 Soft iron is an example of a(an) ___. A electromagnet B temporary magnet C permanent magnet D superconductor

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20 Soft iron is an example of a(an) ___. A electromagnet B temporary magnet C permanent magnet D superconductor

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Answer

B

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21 Like magnetic poles ___. A attract B repel C don't interact

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21 Like magnetic poles ___. A attract B repel C don't interact

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Answer

B

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22 What does this type of field drawing represent? A Attraction B Repulsion C Suspension

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22 What does this type of field drawing represent? A Attraction B Repulsion C Suspension

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Answer

A

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23 A test compass at A will be oriented like:

A B C D

A Slide 25 / 38

23 A test compass at A will be oriented like:

A B C D

A

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Answer

A

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24 A test compass at B will orient itself like:

A B C D

B Slide 26 / 38

24 A test compass at B will orient itself like:

A B C D

B

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Answer

A

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25 Magnetic field lines exit from the south pole of a magnet. True False

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25 Magnetic field lines exit from the south pole of a magnet. True False

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Answer

False

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26 As the distance from a magnetic field is increased, the magnetic field intensity will ___. A increase B decrease C stay the same

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26 As the distance from a magnetic field is increased, the magnetic field intensity will ___. A increase B decrease C stay the same

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Answer

B

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27 Moving electric charges (electric current) causes a magnetic field to form. True False

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27 Moving electric charges (electric current) causes a magnetic field to form. True False

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Answer

True

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28 The __________ rule is the rule that relates the direction of a magnetic field surrounding a wire carrying current.

A

left thumb

B

right hand

C

right arm

D

left hand

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28 The __________ rule is the rule that relates the direction of a magnetic field surrounding a wire carrying current.

A

left thumb

B

right hand

C

right arm

D

left hand

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Answer

B

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29 The father of modern electromagnetic theory is:

A

Albert Einstein

B

Sir Isaac Newton

C

Michael Faraday

D

Michael Bolton

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29 The father of modern electromagnetic theory is:

A

Albert Einstein

B

Sir Isaac Newton

C

Michael Faraday

D

Michael Bolton

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Answer

C

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30 The ___ rule is used to determine the direction of the magnetic field around a current carrying coil

• f wire.

A

right hand

B

left hand

C

right thumb

D

left thumb

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30 The ___ rule is used to determine the direction of the magnetic field around a current carrying coil

• f wire.

A

right hand

B

left hand

C

right thumb

D

left thumb

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Answer

B

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31 List the three types of fields discussed in this

• chapter. What factors affect the strength of each type
• f field?

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32 How can a) a mass, b) a positive charge, and c) a compass be used as field detectors?

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33 Explain the process of induction.

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34 How do electric field diagrams and magnetic field diagrams compare to each other for attraction/ repulsion? Explain your answer in a short paragraph.

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35 How is Coulomb's Law (forces between charges) similar/different to Newton's Law of Gravitation (forces between masses)? Similarities Differences

Answer

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36 Drag and drop the terms below to into the Newton's Law of Gravitation or Coulomb's Law. If they are used for both Laws place the term on the line. Newton's Law of Gravitation Coulomb's Law Mass Charge As distance increases force drops Attraction Repulsion Field

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