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Science > Static Electricity > Flashcards

Static Electricity Flashcards

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1
Q

True or False. Charges that are alike repel each other

A

True

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2
Q

True or False. In a neutral material that number of protons is always greater than the number of electrons.

A

False. They are always the same.

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3
Q

True or False. Static charges result from an imbalance of protons and neutrons.

A

Static charges result from an imbalance of protons and electrons.

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4
Q

True or False. An insulator is a material through which electrons cannot move easily.

A

True

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5
Q

True or False. A conductor is a material through which electrons cannot move easily.

A

False. An insulator is a material through which electrons can move easily.

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6
Q

True or False. You can charge an object without touching it.

A

True

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7
Q

True or False. A metal and an insulator will produce a static charge if rubbed together.

A

True

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8
Q

True or False. An induced charge is a permanent build up of electrons formed when a charged object is brought close to a
neutral object.

A

False. An induced charge is a temporary re-arrangement of electrons formed when a charged object is brought close to a neutral object.

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9
Q

True or False. Static charge is electric charge which is moving.

A

False. Static charge is electric charge, which is not moving.

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10
Q

True or False. A charged object can repel a neutral object.

A

False. A charged object can attract a neutral object.

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11
Q

When a negatively charged rod is brought near an uncharged electroscope, the leaves will: a) move together b) move apart c) stay the same d) move together and then apart again
b) move apart

A

b) move apart

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12
Q

Which of the following will not produce an electrostatic charge when rubbed together? a) A comb and dry hair b) A metal rod and silk c) A ballon and fur d) A glass rod and plastic wrap

A

b) A metal rod and silk

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13
Q

An object is found to have a charge of positive three on it. This means that it: a) gained three electrons b) gained three protons c) lost three elections d) lost three protons

A

c) lost three electrons

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14
Q

Neutral objects are attracted a) A comb and dry hair b) A metal rod and silk c) A ballon and fur d) A glass rod and plastic wrap

A

d) A glass rod and plastic wrap

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15
Q

A neutral ebonite rod is rubbed with a neutral piece of fur. Which of the following will receive a charge? a) ebonite rod only b) fur only c) both the rod and the fur d) neither the rod nor the fur

A

c) both the rod and the fur

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16
Q

A metal leaf electroscope is being charged positively by contact. Which particles move and in which direction? a) Electrons move from the plate to the metal leaves b) Electrons move from the plate to the charged rod c) Protons move from the plate to the metal leaves d) Protons move from the charged rod to the plate.

A

b) Electrons move from the plate to the metal leaves

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17
Q

To charge an electroscope positively by induction, the plate is touched with a neutral finger while a positive rod is held nearby. The finger: a) neutralizes the electroscope b) repels electrons to the leaves c) conducts electrons away to the ground d) conducts protons from the ground

A

c) conducts electrons away to the ground

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18
Q

Atoms contain positively charge ______ in their nucleus and negatively charged ______ orbiting in energy levels

A

protons, electrons

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19
Q

The Law of Charges states that similar charges _____, while opposite charges _____.

A

repel, attract

20
Q

An electric charge can be produced by ______ two materials together so that ______ are transferred from one material to the other.

A

rubbing, electrons

21
Q

To build up a static charge, the material you use must be a(n) _______ because they ____ their electrons.

A

insulator, bond

22
Q

A static charge will rarely build up in a metal because it is a(n) _____ because they ____ their electrons.

A

conductor, release

23
Q

In the term “static electricity”, the word “static” means ______

A

not moving

24
Q

Static electricity is a ____-__ of electrical charge in a material.

A

build-up

25
Q

Static electricity is caused by __________________(_____).

A

a build up of electrons

26
Q

The two kinds of charge are positive and negative.

A

positive, negative

27
Q

When a positively charged rod approaches a negatively charged electroscope, the leaves of the electroscope _______.

A

close together

28
Q

During charging by either friction, contact or induction, the particles that move are the _______. The ____ do not move

A

electrons, protons

29
Q

A neutral object has the same number of ______ and ______.

A

protons, electrons

30
Q

The law of Charges states that ____ attract and____ repel.

A

opposites, likes

31
Q

What two combs rubbed with wool do:

A

Repel

32
Q

The part of the atom that is easily removed:

A

Electron

33
Q

A material that does not conduct electricity

A

insulator

34
Q

Charging an object without contact

A

induction

35
Q

The charge on a glass rod rubbed with silk

A

Positive

36
Q

The charge on a balloon rubbed with fur

A

Negative

37
Q

The type of material throughout which electrons flow easily

A

Conductor

38
Q

Used to detect the presence of an electric charge

A

Electroscope

39
Q

The part of an atom that has a positive charge

A

Nucleus

40
Q

This is caused by a charge separation between clouds and the Earth

A

Lightning

41
Q

Why do you have to use insulting materials in static electricity experiments?

A

Conducting materials allow electrons to move easily, so you will not get a build up of electrons in conductors.

42
Q

What should you do if you come across someone who is being electrocuted by live wires?

A

If possible, turn off the power first. Push the live wires off the body using an insulating material.

43
Q

List five safety rules for survival in lightning storms.

A
  • Stay in your car
  • Stay away from water
  • Avoid power lines or hydro poles
  • Don’t use long metal objects
  • Stay away from big trees
  • Crouch down low
  • Unplug you computer, stereo, and TV.
44
Q

What does the term “GROUNDED” mean?

A

Grounding means hooking wires into the ground to take large surges of electricity from lighting into the Earth rather that into your house where it can wreck your appliances.

45
Q

Draw a series of sketches or describe how an object can get a static electric charge.

A

Rubbing causes friction that gives energy to the electrons so they move from one object into the other. The build-up of electrons in one object is a negative charge while the loss of electrons in the other is a positive charge.

46
Q

Sometimes, no matter how hard you rub two objects together, they will not become charged. Explain why this is.

A

Either they are conductors so that the electrons won’t build up in them, or they are same type of material. so neither can take the electrons.

Science (6 decks)

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