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Physics > Static Electricity > Flashcards

Static Electricity Flashcards

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1
Q

How is an atom electrically neutral?

A

When it contains equal number of protons and electrons

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2
Q

What charge do electrons have?

A

Negative

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3
Q

What charge do protons have?

A

Positive

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4
Q

What causes an object to be negatively charged?

A

Gaining electrons

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5
Q

What causes an object to became positively charged?

A

Losing electrons

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6
Q

What is static electricity?

A

Imbalance between negative and positive charges in an object

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7
Q

Until when does the charge remain?

A

Until it is able to move away in means of electric current or discharge

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8
Q

What is a conductor

A

Material that allows electrons to flow freely through it

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9
Q

What is an electric current?

A

Flow of charged particles (electrons) moving through an electrical conductor

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10
Q

What is an insulator?

A

Material that resists the flow of electrons

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11
Q

When can electrons be transferred from one material to the other?

A

When 2 insulating materials come into close contact or rub together

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12
Q

Why can’t positive charges be transferred?

A

They are fixed in the nuclei of the atoms

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13
Q

What will two oppositely charged objects do?

A

Attract each other

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14
Q

What is an electrostatic force?

A

A non-contact force which pushes or pulls on objects without touching them

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15
Q

Two objects with the same charge will…..

A

Repel each other

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16
Q

What does rubbing a balloon on a sweater cause?

A

Build up of electrons on the balloon giving it a negative charge

17
Q

Why, when you rub a balloon against your sweater will it stick to a wall?

A

Because the negative change on the balloon repels electrons in the wall making the wall’s surface near the balloon positive.

18
Q

What does it mean when an object is neutral?

A

It has the same number of protons as electrons

19
Q

How is lightning and sparks caused?

A

By the sudden discharge of static electricity

20
Q

What is cloud - to-ground lightning?

A

Discharge between the negative base of a cloud and the positive ground below

21
Q

What is intra-cloud lighting?

A

Discharge within cloud between negative base and positive top

22
Q

What is inter-cloud lightning?

A

Discharge between the negative and positive areas of two clouds

23
Q

What is an electric field?

A

The space around a charged object where it has an affect

24
Q

How can charged particles exert a force on each other without touching?

A

Because of the force fields

Physics (2 decks)

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