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L Theory > Current > Flashcards

Current Flashcards

1
Q

All matter is made up of minute particles called …

A

Atoms

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2
Q

Atoms vary in …, …, … and … depends if on the chemical element to which they belong

A

Size, weight, structure and complexity

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3
Q

Atoms have a central core called a …

A

Nucleus

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4
Q

Negatively charged … called … travel round the nucleus

A

Particles
Electrons

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5
Q

The nucleus of all atoms contains particles called …

The … are positively …

A

Protons
Charged

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6
Q

The electrons are held in orbit by a

A

Force of attraction

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7
Q

The centrifugal force of orbit is equal to the … … …

A

Force of attraction

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8
Q

In a balanced atom, the number of protons in the nucleus and the number of electrons in orbit are …

A

Equal

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9
Q

The outer most orbit is knows as the … …

A

Valence shell

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10
Q

The electron in this outer orbit is known as the … …

A

Valence electron

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11
Q

The greater the distance between the nucleus and the orbiting electrons the bond will be … between them

A

Weaker

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12
Q

What are electrons called when they are forced out of orbit?

A

Free electrons

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13
Q

The movement of the free electrons create a?

A

Electrical current

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14
Q

What are materials called that require very little energy to force electrons out of orbit and enable current to flow?

A

Conductors

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15
Q

In some materials the bond between nucleus and electrons is much stronger and the electrons are not so easily dislodged?

A

Insulators

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16
Q

When an electron is forced out of orbit what happens to the atom?

A

Becomes positively charged
(Positive ion)

17
Q

An ion is a atom that has either a … or … of electrons

A

Surplus
Deficiency

18
Q

All negative electrons are attracted to… …

A

Positive charges

19
Q

All negative electrons are replied by … …

A

Negative charges

20
Q

A example of one method of achieving this flow is the … … within a battery

A

Electric cell

21
Q

The initial action within the electric cell is NOT electron flow but the result of a … …

A

chemical Action

22
Q

The battery cell consists of a .. in which … plates of different … are suspended

A

Container
Two
Metals

23
Q

The liquid in the battery cell is called the …

A

Electrolyte

24
Q

During the chemical reaction in the battery cell the action courses one plate to lose electrons and become … … whilst the other plate gains electrons and becomes … …

A

Positively charged
Negatively charged

25
Q

The flow of electricity is called the … …
Which is the movement of … … move through along a …

A

Electric current
Free electrons
Conductor

26
Q

ELECTRON FLOW is always … to …

A

Negative
Positive

27
Q

When electricity was thought to flow from positive to negative, it is now known as … … …

A

Conventional current flow

28
Q

The unit of measurement of current is the ampere which is written as a capital …

A

A

29
Q

Amps is the amount of … passing at a given point in one second.

A

Electrons

30
Q

The effects of current flow are to cause … and set up a … … round a conductor

A

Heat
Magnetic field

31
Q

The circuit symbol for current is?

A

I

L Theory (10 decks)

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