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ELECTRICS > WEEK ONE NOTES > Flashcards

WEEK ONE NOTES Flashcards

1
Q

What is conduction?

A

The movement of electrons

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2
Q

What are conductors?

A

Materials that accept the flow of electrons/ electricity from other atoms

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3
Q

What is the equation for electrical charge?

A

Q = I x t

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4
Q

What is electrical current?

A

The rate of flow of electrical charges/ electrons

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5
Q

What is the equation for electric current?

A

I = Q/t

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6
Q

What is potential difference?

A

The energy required to move electricity

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7
Q

What are some sources of e.m.f?

A

Batteries or generators

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8
Q

What energy does a battery use to make an emf?

A

Chemical

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9
Q

What energy does a generator use to make an emf?

A

Converts mechanical energy into emf via magnetic and electrical fields

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10
Q

What is the equation for current?

A

I = V/R

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11
Q

What are insulators?

A

Materials that prevent the flow of electrons.
Have 5 or more electrons in valence shell

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12
Q

What is as semi-conductor?

A

Materials that can be changed to act as a conductor or insulator.
4 electrons in valence shell

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13
Q

When is an electrical charge produced?

A

When there is too many or too few electrons in an atom

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14
Q

What is ionization?

A

The process of loosing or gaining electrons

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15
Q

What is an ion?

A

An atom that has lost or gained an electron

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16
Q

Describe the neutral state of an atom

A

They have little attraction to other atoms.
If these atoms get too close they may share electrons/form bonds

17
Q

Describe the ionized state of an atom.

A

An ionized atom is an ion, they have a strong attraction to other atoms, due to the strong electric field.

18
Q

What force do electric fields exert?

A

Coulomb force

19
Q

What is an electric field?

A

Produced by protons and electrons.
It is a region where charges experience a force.

20
Q

What is electricity?

A

The movement of electrons between atoms

21
Q

When is kinetic energy produced?

A

When an object moves

22
Q

Where does potential energy result from?

A

An objects arrangement

23
Q

What is potential difference also known as?

A

Voltage

24
Q

What is 1 Volt equal to?

A

Its equal to 1 joules, 1 Coulomb etc

25
Q

What is the equation for energy transferred?

A

E = QV
Energy in joules = charge x potential difference

26
Q

What is ground/common?

A

The process of moving excess charge by providing a pathway back to the source or into the ground

27
Q

What is the difference between the emf and voltage?

A

emf is the measure of energy supply whereas voltage is the energy used by one coulomb to move

28
Q

What is the equation for emf?

A

emf (V) = E/Q
emf = energy/ charge

ELECTRICS (5 decks)

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