Electricity Test (January 19th) Flashcards

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1
Q

A proton is _________ charged

A

Positively

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2
Q

An electron is _________ charged

A

Negatively

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3
Q

Define electricity

A

Build up and movement of charged particles (electrons)

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4
Q

What do opposites do?

A

Attract

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5
Q

What do like charges do?

A

Repel

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6
Q

Define static

A

The buildup of charges in one spot

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7
Q

What are some examples of static discharge?

A

Lightning

Being shocked

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8
Q

What are the three ways of transferring static electricity?

A

Friction
Conduction
Induction

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9
Q

How does friction occur?

A

By rubbing

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10
Q

How does conduction occur?

A

By direct contact

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11
Q

How does induction occur?

A

Indirect contact

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12
Q

What is an example of friction?

A

Balloon and hair

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13
Q

What is an example of conduction

A

Balloon and can

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14
Q

What is an example of induction?

A

Electroscope

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15
Q

Define current

A

The flow of charges from one place to another

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16
Q

What are the two different currents?

A
  • Alternative Current (AC)

- Direct Current (DC)

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17
Q

What does direct current mean?

Who invented it?

A
  • one direction

- Edison

18
Q

What does Alternating current mean?

Who created it?

A
  • goes both ways

- Tesla

19
Q

What is voltage?

What is its unit?

A

-“Potential difference”
In a circuit, voltage source is the battery. If there is no potential difference, the current will NOT move.
-Volt

20
Q

What is current?

What is its unit?

A
  • The flow of electrons, carries energy

- Ampere

21
Q

What is resistance?

What is its unit?

A
  • a measure of how easily current moves through an object. Anything that “eats” uses current to work its resistance.
  • Ohm
22
Q

Symbol for Voltage

A

V

23
Q

Symbol for Current?

A

I

24
Q

Symbol for resistance?

A

R

25
Q

The Ohm symbol is a__?

A

Omega

26
Q

What are the two charges?

A

Positive and negative

27
Q

Know the symbols for Battery, wire, switch, resistor, and blulb

A

k

28
Q

Which path will current take?

A

The path of least resistance

29
Q

If one bulb dies in a series current, then _______

A

they all die

30
Q

What happens to a fuse when to much current overloads a circuit?

A

The fuse melts to save the circuit

31
Q

What is a fuse?

A

A small wire

32
Q

What happens to a breaker when too much current overloads a circuit?

A

The breaker turns itself off to protect the circuit

33
Q

What is a breaker?

A

a switch that flips

34
Q

Does a breaker have to be replaced?

A

No

35
Q

What is Ohm’s law?

A

V=IR
(Voltage=Current x resistance)
(Volts (V)= Amperes (A) x Ohms)

36
Q

What happens when current travels through a wire?

A

It creates a magnetic field around the wire

37
Q

Define electromagnet

A

a core made into a magnet because of the flow of electric current.

38
Q

Can an electromagnet be turned off?

A

Yes, because current can be turned on and off

39
Q

Define transformer

A

A device that increases or decreases voltage

40
Q

What does a step up transformer do?

A

Increases voltage

41
Q

What does a step down transformer do?

A

Decreases voltage