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Science Electricity > Electricity > Flashcards

Electricity Flashcards

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1
Q

Explain electric insulators

A

Something that electricity cannot flow throuvh

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2
Q

Explain electric conductors

A

Something electricity easily flows through

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3
Q

How do objects become neg- charged

A

Gain electrons

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4
Q

How do objects become pos+ charged

A

Loose electrons

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5
Q

What is the law of electric charge

A

Alike charged repel opposite attract

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6
Q

How are objects charged by friction

A

Rubbing together makes one object loose and the other gain e-

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7
Q

How are objects charged by contact

A

One charged object touches neutral object and transfers e-

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8
Q

How are objects charged by induction

A

Charged object repelling/attracting e- without touching

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9
Q

What is E and it’s units

A

Energy, joules (J)

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10
Q

What is Q and it’s units

A

Charge, coulombs (c)

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11
Q

What is V and it’s units

A

Potential differance, Volts, V

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12
Q

What is I and units

A

Current, Amperes, A

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13
Q

What is t and units

A

time, seconds, s

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14
Q

What is R and units

A

Resistance, ohms, omega symbol

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15
Q

What is P and units

A

Power, watts, w

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16
Q

How is voltmeters contacted in a circuit

A

Parrallel

17
Q

How are ammeters connected in circuits

A

Series

18
Q

Does current stay the same in series?

A

Yes

19
Q

Does current stay the same in parrallel?

A

No

20
Q

What happens if a bulb burns out in series?

A

Everything stops

21
Q

What happens if bulb burns out in parrallel

A

Current decrease, bulbs stay on

22
Q

What gives more resistance?

A

Longer wire, smaller diameter, less conductive, hot tempature

23
Q

What is current?

A

Flow of electrons

24
Q

What is potential differance?

A

Differance in electric potential energy per unit of charge measured at different any points in the circuit

25
Q

What is efficiency

A

Measure of energy input to output

26
Q

What is always wasted energy?

A

Heat

27
Q

Name different kinds of ways to make electricity

A

Fossil fuels, nuclear fission, hydroelectric, solar, wind, biomass, geothermal.

28
Q

What is best conductor?

A

Copper

29
Q

How do we get electricity?

A

Fuel->steam->turbine->generator->transformer->distribution

30
Q
A

Science Electricity (1 decks)

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