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

What happens when a electric current flows

A

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

2
Q

True or false

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

A

False

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

3
Q

True or false

The current tells us how fast the particles are moving

A

True

4
Q

How do we measure currents

A

We measure a current in amps so we use an ammeter

5
Q

Describe the correlation between voltage and energy

A

The higher the voltage the more energy

6
Q

What is resistance measured in

A

Ohms

7
Q

How does the resistance in a wire increase

A

The length of the wire increase the resistance

If the wire is thinner the resistance increases

8
Q

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

A

Yes

9
Q

True or false

In a parallel circuit the components are in different branches

A

True

10
Q

In a parable circuit what happens if you add more branches

A

The current coming out of the battery will increase

11
Q

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

A

The current will take the path of less resistance

12
Q

What materials will a magnet attract

A

Steel, iron, nickel and cobalt

13
Q

Will an electric current flow if there is no power source

A

No

14
Q

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

A

Yes

15
Q

Is the magnetic field going round a straight wire circular

A

Yes

16
Q

How can we increase the strength of an electromagnet

A

Increasing the current

Increasing the number of turns

Wrapping it in iron core

17
Q

How can an insulating material be charged

A

it may be charged by friction

18
Q

True or false

A charged object will attract an uncharged object

A

True

19
Q

Will two forces with the same charge attract each other

A

No they will repel each other