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Avionics > Electrical Stuff > Flashcards

Electrical Stuff Flashcards

1
Q

Surplus of electrons?

A

Negatively charged

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2
Q

Three electrical quantities?

A

Voltage
Current
Resistance

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3
Q

What is voltage?

A

Difference in charge between 2 points.

Measurement of potential difference.

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4
Q

What is current?

A

Rate of flow of electric charge in a body.

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5
Q

What is resistance?

A

Materials tendency to resist the flow of charge.

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6
Q

Components in a circuit m, allow us to?

A

Control the charge.

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7
Q

Three material properties?

A

Insulators
Semiconductors
Conductors

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8
Q

5 conductor examples?

A 
Gold
Silver 
Zinc 
Magnesium 
Copper 
Iron 
Aluminium
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9
Q

What happens to charged electrons in a vacuum?

A

Uninhibited

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10
Q

Lethal DC voltage?

A

50v

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11
Q

Lethal AC voltage?

A

30v

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12
Q

What does static electricity require?

A

Separation of positive and negative charges.

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13
Q

What is charge?

A

Displacement of electrons produce electrical charges, more electrons at one point and a lack at another.

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14
Q

What is a Coulomb?

A

Unit of electric charge

Quantity of electricity transported in one second by a current of one ampere.

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15
Q

What is potential difference?

A

State of charge of one body relative to another.

Measured in volts

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16
Q

Define current?

A

Flow of electrons

Unit ampere

Measured using ammeter

17
Q

Conventional current?

A

Flow from positive to negative

18
Q

Electron flow

A

Out of negative into the positive

19
Q

How are ammeters placed?

A

Series

20
Q

What is resistance?

A

Opposition to current flow.

21
Q

What is electromotive force?

A

When a source of electrical energy with a potential difference can maintain a continuous flow. Volts

22
Q

Electrical power?

A

Rate of energy dissipation in electrical power

23
Q

What is ohms law?

A

V

I R

24
Q

Electrons in a direct current flow in?

A

One direction

25
Q

What current do batteries use?

A

DC

26
Q

What is a period

A

Time taken for one cycle

27
Q

Frequency is the number of cycles completed in?

A

1 second

Avionics (1 decks)

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