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Science > Electricity and Magnetism > Flashcards

Electricity and Magnetism Flashcards

1
Q

Law of Electric Charges

A

States that like charges repel and opposite charges attract.

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2
Q

Electrons

A

Subatomic particles which orbit the nucleus of an atom and are negatively charged. Electrons are found outside the nucleus.

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3
Q

Electric Force

A

The force between charged objects.

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4
Q

Two factors determining the strength of electrical force are?

A

1: size of the charges
2: distance between charges

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5
Q

Conductor

A

materials in which charges can move easily

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6
Q

Insulator

A

materials in which charges cannot move easily

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7
Q

Static electricity

A

The build up of electric charges on an object. ( An object charges by friction because of the rubbing of two objects together can cause electrons to be whipped from one object and transferred to another)

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8
Q

Electric discharge

A

The loss of static electricity as charges move off an object

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9
Q

Electric discharge example

A

Walking on carpet with your fuzzy socks on, negatively charge builds up on your body. touching a metal door knob.

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10
Q

Cell

A

A device that produces an electrical current by converting chemical energy into electric energy.

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11
Q

Battery

A

A device made up of several cells.

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12
Q

Current

A

The rate at which charge passes through a given point.

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13
Q

Current SI unit?

A

Amps

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14
Q

Resistance

A

The opposition to the flow of electric charge.

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15
Q

Electrical power

A

the rate at which electrical energy is used to do work.

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16
Q

Circut

A

a complete closed path through which electric charges flow.

17
Q

Voltage

A

the amount of energy released as a charge moves between 2 points in the path of a current

18
Q

What is the SI unit of power?

A

Watts

19
Q

Magnet

A

any material that attracts iron or materials containing iron

20
Q

magnetic poles

A

part of a magnet where the magnetic effects are the strongest

21
Q

magnetic field

A

exist in the region around a magnet in which magnetic forces can act

22
Q

Electromagnetism

A

interaction between electricity and magnetism

23
Q

Electromagnet

A

a magnet that consists of a coil of wire wrapped around an iron core

24
Q

Electric motor

A

a device that changes electrical energy into KE

25
Q

Ohms law

A

V=IR

26
Q

Resistance formula

A

R=V/I

27
Q

Current Formula

A

I=V/R

Science (10 decks)

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