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Science > Eletricity and Magnetism > Flashcards

Eletricity and Magnetism Flashcards

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1
Q

What do positive charges so to positive charges

A

They repel each other

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2
Q

What do positives and negatives do

A

Actract

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3
Q

What do negatives and negatives do

A

Repel

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4
Q

What are two charges

A

Positive charge and negative charge

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5
Q

What is a proton

A

A part of an atom which has a positive charge

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6
Q

What is a electron

A

A part of an atom which has a negative charge

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7
Q

What is a nuetron

A

A part of an atom which has no charge

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8
Q

What is a current

A

The amount of charge flowing per second

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9
Q

What can you use to mesure current

A

An ammeter

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10
Q

What is the symbol for amps

A

A

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11
Q

What do you use to mesure potential difference

A

A voltmetre

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12
Q

What is the unit of potential difference

A

Volts

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13
Q

What does potential difference do

A

It provides the push to make charges move

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14
Q

How many loops are there in a series circuit

A

1

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15
Q

How many loops are there in a parallel circuit

A

Multiple

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16
Q

What happens if a bulb breaks in a parallel circuit

A

The other lights stay on

17
Q

What happens to the total current if you add more branches to a parallel circuit

A

The total goes up

18
Q

What is resistance measured in

A

Ohms

19
Q

What is resistance

A

How easy or hard it is for a cahrge to pass through

20
Q

What do north poles do to other north poles

A

They repel

21
Q

What do south poles do to south poles

A

Repel

22
Q

What do south poles do to north poles

A

Attract

23
Q

State two ways you can find the magnetic field of an object

A

Using plotting compasses

Using iron filings

24
Q

What is the magnetic field if the filings are closer together

A

Stronger

25
Q

What is usually the core of an electromagnet

A

Wire

26
Q

What three things effect the strength of an electromagnet

A

The number of turns in the wire
The current flowing in the wire
The type of core

27
Q

What can u use scrap metal for

A

Sorting scrap metal

Science (9 decks)

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