Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics > Static and current Electricty 💂🏽 > Flashcards

Static and current Electricty 💂🏽 Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

Polythene rod

A

Gains electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Perspex rod

A

Looses electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Earthing?

A

When a charged object looses its charge to the Earth through a conductor.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Static electricity?

A

Is a build up of electric charge that can occur on good insulators e.g. Polythene and perspex rods.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Electric current

A

Is a flow of electric charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Conductors

A

Are substances which allow electric current to flow through them freely

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Insulators

A

Are substances which do not allow electric current to flow through them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Closed circuit

A

Is needed for the current toflow, if there is a break in a circuit then the current wont flow.( the electrical energy cant get through)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Energy provided

A

Energy is provided by a battery or power pack, it is needed to move the current around the circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The battery pumps electrons

A

From its negative end around a circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

The electrons are attracted

A

back to the positive end of the battery.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Potential differnece

A

The difference in electrical pressure between the positive and negitive ends of a battery/power pack

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Whenever this is a potential difference

A

Electricity will flow

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

This potential difference is known as

A

Voltage and is measured in volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Resistance

A

Is the opposition to the flow of electrons. The unit is ohm and it is measured using a ohmmeter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Resistor

A

If a resistor is placed im an electron circuit, it will slow down the flow of electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Ohm’s law?

A

Ohm’s law states that voltage is directly proportional to current.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

DC

A

Direct current goes in one direction only.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

AC

A

Alternating current changes very quickly many times a second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Mains supply

A

Is A.C, it flows at a potential difference of 230 volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

The ring circuit

A

Made if live neutral and earth wires. Sockets are tapped off at points along this ring circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Fuses

A

A fuse is a safety device that prevents the circuit from overheating. It will melt when it is too hot breaking the circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Circuit breaker

A

A circuit breaker is used in the fuse board of the home, and this trips, to stop the flow of current from entering the house

24
Q

Live wire

A

The live wire os brown and carries most electricity it is connected to the plugs fuse on the right hand side

25
Q

Neutral wire

A

The neutral wire is blue and is connected to the left hand side

26
Q

Earth wire

A

The earth wire is a safety wire, no electricity flows in the earth wire unless the appliance it is attached to becomes “live” E.g a toaster, in this case the earth wire would carry the current to the earth instead of you electrocuting yourself should you touch the toaster.

27
Q

Watt

A

Is the unit of electrical power

28
Q

ESB charges a fee for the number of …

A

Kilowatts (1000 watts) used per hour

29
Q

ESB’s unit of electricity is …

A

The kilowatt hour (kWh)

30
Q

A kilowatt hour …

A

Is the electrical energy used by 1kW appliance running for 1 hour.

31
Q

Ohm’s law?

A

Oh,’s law states that voltage is directly proportional to current.

32
Q

DC

A

Direct current goes in one direction only.

33
Q

AC

A

Alternating current changes very quickly many times a second

34
Q

Mains supply

A

Is A.C, it flows at a potential difference of 230 volts

35
Q

The ring circuit

A

Made if live neutral and earth wires. Sockets are tapped off at points along this ring circuit

36
Q

Fuses

A

A fuse is a safety device that prevents the circuit from overheating. It will melt when it is too hot breaking the circuit

37
Q

Circuit breaker

A

A circuit breaker is used in the fuse board of the home, and this trips, to stop the flow of current from entering the house

38
Q

Live wire

A

The live wire os brown and carries most electricity it is connected to the plugs fuse on the right hand side

39
Q

Neutral wire

A

The neutral wire is blue and is connected to the left hand side

40
Q

Earth wire

A

The earth wire is a safety wire, no electricity flows in the earth wire unless the appliance it is attached to becomes “live” E.g a toaster, in this case the earth wire would carry the current to the earth instead of you electrocuting yourself should you touch the toaster.

41
Q

Heating effect

A

Boil water in a kettle, immersion heater, electric cooker, fuse in plug

42
Q

Chemical effects

A

Electroplating cheap metal with more expensive metal e.g. Silver , electrolysis (splitting) of water, mobile phone

43
Q

Magnetic effect

A

Electromagnet made with a wire wrapped around a nail, electric motor, speakers, circuit speaker breaker in fuse board.

44
Q

Electronics

A

Is the careful and exact control of tiny amounts of electric current.

45
Q

Diodes

A

A diode is a component that will allow current to flow in one direction only.

46
Q

Forward biased

A

If the positive end of the battery is connected to the positive end of a diode the diode is said to be “forward biased” and current can flow.

47
Q

Reverse biased

A

If the positive end of the battery is connected to the negative end of the diode it is said to be “reversed boased” and no electricity can flow.

48
Q

A diode can be used to…

A

Change alternating current into direct current

49
Q

Electronic devices such as radios, tape recorders and calculators need….

A

Low voltage direct current

50
Q

Light emitting diode is ….

A

A diode that gives out light when a current flows through it.

51
Q

Current will only flow when LED is…

A

Forward biased

52
Q

LEDs use only tiny currents so …

A

A resistor must be connected in series with it.

53
Q

LEDs are useful as they are…

A

Cheap, reliable and long lasting and use far less current than other light bulbs

54
Q

An LDR is a…

A

Light dependent resistor

55
Q

Light dependent resistor

A

Is a resistor whose resistance depends on light

56
Q

When light falls on an LDR ..

A

Its resistance decreases, this low resistance will allow a current through the circuit.

Physics (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions