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Flashcards in Physics-electeicity+magnetism Deck (19)
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1

What happens when a electric current flows

Tiny particles move in the wire these particles Carry energy that is used up by the components

2

True or false

An electric current s the movement of positively charged particles called neutrons

False

An electric current is the movement of NEGATIVELY charged particles called ELECTRONS

3

True or false

The current tells us how fast the particles are moving

True

4

How do we measure currents

We measure a current in amps so we use an ammeter

5

Describe the correlation between voltage and energy

The higher the voltage the more energy

6

What is resistance measured in

Ohms

7

How does the resistance in a wire increase

The length of the wire increase the resistance

If the wire is thinner the resistance increases

8

In a series circuit if we add more components will the current go down

Yes

9

True or false

In a parallel circuit the components are in different branches

True

10

In a parable circuit what happens if you add more branches

The current coming out of the battery will increase

11

Will current rake the path of more resistance or less resistance if there is two wires

The current will take the path of less resistance

12

What materials will a magnet attract

Steel, iron, nickel and cobalt

13

Will an electric current flow if there is no power source

No

14

Will a wire with a current going through act like a magnet

Yes

15

Is the magnetic field going round a straight wire circular

Yes

16

How can we increase the strength of an electromagnet

Increasing the current

Increasing the number of turns

Wrapping it in iron core

17

How can an insulating material be charged

it may be charged by friction

18

True or false

A charged object will attract an uncharged object

True

19

Will two forces with the same charge attract each other

No they will repel each other