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GCSE Physics AQA > P4 - Electric circuits 1️⃣✅ > Flashcards

P4 - Electric circuits 1️⃣✅ Flashcards

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1
Q

What is an insulator?

A

An insulator is a material bad a conducting heat/electricity/ transferring enegy

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2
Q

What is a conductor?

A

A conductor is a material good at conducting electricity or heat/ energy

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3
Q

What are like charges?

A

When charges are like, they are the same therefore repel away from each other

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4
Q

What are unlike charges?

A

When charges are unlike, they are different/opposite therefore attracted to each other

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5
Q

What is an electric field?

A

A area around a charged object

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6
Q

What is a spark?

A

An abrupt electrical charge

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7
Q

What is current?

A

the measure of the flow of charged electrons around a circuit

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8
Q

What are the units for current?

A

A, Amps

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9
Q

What is the symbol for current?

A

I

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10
Q

What are the units for charge?

A

C, Coulombs

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11
Q

What is the symbol for charge?

A

Q

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12
Q

What is the equation that links current, charge and time?

A

I = Q/t

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13
Q

What is potential difference?

A

a measure of energy, per unit of charge, transferred between two points in a circuit

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14
Q

What are units for potential difference?

A

V, Volts

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15
Q

What is the symbol for potential difference?

A

V

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16
Q

What is voltage?

A

Voltage is the amount of energy transferred per coulomb of charge

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17
Q

What are the units for voltage?

A

V, Volts

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18
Q

What is the symbol for voltage?

A

V

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19
Q

What is a fuse?

A

A fuseiis a thin piece of wire that will melt if the current is too high e.g. breaks a circuit if a fault in an appliance causes too much current to flow

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20
Q

What is resistance?

A

Everything that resists/ opposes the flow of charged electrons

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21
Q

What are the units for resistance?

A

Ω, Ohms

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22
Q

What is the symbol for resistance?

A

R

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23
Q

What is ohms law?

A

the higher the current the lower the resistance
(V = I x R)

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24
Q

What is the equation that links resistance, current and potential difference?

A

V = I x R

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25
Q

What is an IV curve?

A

A graph of current against voltage

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26
Q

What is a series circuit?

A

When components are connected in one loops, connected one after the other

27
Q

What is a parallel circuit?

A

A parallel circuit is a circuit with more than one loop in it

28
Q

What is the equation that links charge, energy transferred and potential difference?

A

E = Q x V

29
Q

What is an acronym for the equation that links charge, energy transferred and potential difference?

A

Englands Queen Victoria

30
Q

What is the eqauation that links power, current and voltage?

A

P = I x V

31
Q

What is the equation that links power, current and resistance?

A

P = I(squared) x R

32
Q

Current is _______ in a series circuit

A

the same across all the components

33
Q

Potential difference is _______ in a series circuit

A

shared e.g. Vtotal = V1 + V2 + V3…

34
Q

Resistance _______ in a series circuit

A

sum of all individual resistances of each component

35
Q

Current is _______ in a parallel circuit

A

shared e.g. Itotal = I1 + I2 + I3…

36
Q

Potential difference is _______ in a parallel circuit

A

the same across all components

37
Q

Resistance _______ in a parallel circuit

A

lowers/ decreases the more components added

38
Q

What does a diode do?

A

Allows current to flow in only one direction

39
Q

What does a reisistor do?

A

Set the current in a circuit

40
Q

What does a variable resistor do?

A

Vary the size of current in a series circuit

41
Q

What does a thermistor do?

A

measures temperature of a circuit/ resistance increases as temp falls

42
Q

What is the circuit symbol for an open switch?

A
43
Q

What is the circuit symbol for a closed switch?

A
44
Q

What is the circuit symbol for a cell?

A
45
Q

What is the circuit symbol for a battery?

A
46
Q

What is the circuit symbol for a diode?

A
47
Q

What is the circuit symbol for a resistor

A
48
Q

What is the circuit symbol for variable resistor?

A
49
Q

What is the circuit symbol for a LED?

(light emitting diode)

A
50
Q

What is the circuit symbol for a lamp?

A
51
Q

What is the circuit symbol for a fuse?

A
52
Q

What is the circuit symbol for a voltmeter?

A
53
Q

What is the circuit symbol for an ammeter?

A
54
Q

What is the circuit symbol for a thermistor?

A
55
Q

What is the circuit symbol for an LDR?

(light dependent resistor)

A
56
Q

Desicribe this graph

A
  • Its a graph associated with a filament lamp
  • the reistance of the lamp increases as the temperature of the lamp increases
57
Q

Describe this graph

A
  • its a graph associated with a diode
  • the current in a diode flows only in one direction
58
Q

Describe this graph

A
  • its associated with a fixed resistor (or ohmic conductor)
  • and the current through it is directly proportional to the potential difference
59
Q

In series circuits:
* (V) Potential Difference is….
* (I) Current is…
* (R) Resistance is …

A
  • shared
  • same
  • sum (added of each component)
60
Q

In parallel circuits:
* (V) Potential Difference is….
* (I) Current is…
* (R) Resistance is …

A
  • same
  • shared
  • lower/decreases (the more components added)
61
Q

What is direct potential difference?

A

Potential difference that always flows in the same direction

62
Q

Voltmeters are connected in __________

A

Voltmeters are connected in parallel

63
Q

Ammeters are connected in __________

A

Ammeters are connected in series

64
Q

What is charge?

A

Charge is a measure of the total current that flowed within a period of time

GCSE Physics AQA (19 decks)

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