# Topic P3: Electricity; Flash Questions

?
• Created by: MiriamL
• Created on: 15-11-19 13:49
What do all materials contain?
Positive and negatively charged particles, usually equal in number making them overally neutral
1 of 30
What does the transfer of electrons from one negatively charged material to another create?
One positively charged materail and one negatively charged
2 of 30
How do we cause this transfer?
Friction (rubbing)
3 of 30
Which material is positive
The one that looses electrons
4 of 30
Which material is negative
The one that gains electrons
5 of 30
What do oppositely charged obkects do?
Attract
6 of 30
What do similarly charged objects do?
Repel
7 of 30
What is the region around a charged object called
electric field
8 of 30
What do field lines show?
The direction a positive charge would move in placed in the field
9 of 30
What is needed for a current to flow?
A potential difference (voltage) abd a conductor
10 of 30
current=
charge/time
11 of 30
Q=
I*T
12 of 30
What does the size of the current depend on?
Voltage of the power supply and resistance of the cirucit.
13 of 30
Energy=
charge*potential difference
14 of 30
Energy=
current*time*pd
15 of 30
What two things do you need to make a current flow?
Cell/battery and a complete circuit
16 of 30
What is the current everywhere in a single closed loop?
The same
17 of 30
Charge flow=
current*time
18 of 30
What are small currents measured in
milliAmps (mA)
19 of 30
What is needed to make a current flow in a circuit?
Potential difference
20 of 30
What happens in a battery?
Substances react to seperate charges making one side positive and another negative
21 of 30
Which charged terminal has the higher electrical potential?
Positive
22 of 30
What does the potential difference and current that a cell can deliver dependant upon?
Construction of the cell (not the size)
23 of 30
What does the longer line on a symbol for a cell show?
Positive
24 of 30
What happens when you apply a pd between the ends of a piece of wire?
You set up an electrical field
25 of 30
When you connect a voltmeter acriss a componenet in a circuit what are you measuring?
Work done or energy transferred by the charges in the component. This is called electrical working
26 of 30
Energy transferred=
potential difference*charge
27 of 30
What can you measure current with? Why must this be in the loop?
Ammeter. The charge needs to flow through them
28 of 30
Where do you need to connect a voltmeter?
Both sides of a component
29 of 30
If you measure the currents at different points in a parralel citcuit what should they add up to?
The current near the battery
30 of 30

## Other cards in this set

### Card 2

#### Front

What does the transfer of electrons from one negatively charged material to another create?

#### Back

One positively charged materail and one negatively charged

### Card 3

#### Front

How do we cause this transfer?

### Card 4

#### Front

Which material is positive

### Card 5

#### Front

Which material is negative