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New Spec Trilogy Paper 1 > Paper 1 > Flashcards

Paper 1 Flashcards

1
Q

Specific heat capacity

A

The amount of energy required to heat 1kg of a substance by 1 degree Centigrade

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2
Q

Power is

A

The rate at which energy is transferred to another form of energy

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3
Q

A Watt is

A

the unit of power and is equal to one Joule transferred in one second

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4
Q

Conservation of Energy

A

Energy cannot be created or destroyed but can be transferred, stored or dissipated to less useful form like heat and sound

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5
Q

In a closed system the overall amount of energy cannot

A

Change

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6
Q

High thermal conductivity means

A

that an object is a good conductor

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7
Q

Renewable resources are

A

ones that are being replenished as it is being used

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8
Q

Non renewable resources are

A

ones that are being used faster than they are being replenished and so will run out

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9
Q

Non renewable resources list (4)

A

coal, oil, gas and nuclear

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10
Q

Reliable resources

A

can produce electricity at anytime

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11
Q

Current is

A

the flow of charge, measured in Amps or A

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12
Q

In a series circuit current is

A

the same at any point in the circuit

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13
Q

In a parallel circuit current is

A

split between the branches (or loops)

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14
Q

Series circuits contain

A

only one loop

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15
Q

Parallel circuits contain

A

more than one loop (or branch)

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16
Q

Linear circuits produce this type of I/V graph

A

Straight line graph

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17
Q

Non Linear circuits produce this type of I/V graph

A

Curved

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18
Q

In a series circuit the Total Resistance of the circuit is equal to

A

the sum of all resistances in the circuit

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19
Q

In a parallel circuit the Total Resistance is

A

always less than the smallest resistor in the circuit

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20
Q

In a series circuit the battery voltage is

A

shared between the devices in the circuit

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21
Q

In parallel circuits the voltage across devices is

A

always equal to the battery voltage

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22
Q

Direct current, DC

A

is current that flows in one direction only

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23
Q

Alternating current AC

A

comes from plugs and constantly switches direction of flow

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24
Q

Mains supply is

A

230 Volts and 50 Hz frequency

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25
Q

3 core cables have

A

live, earth and neutral wires

26
Q

2 core cables have

A

Live and Neutral wires

27
Q

Plastic devices don’t need an Earth wire because

A

plastic doesn’t conduct electricity

28
Q

Live wire is

A

Brown

29
Q

Earth wire is

A

yellow/green

30
Q

Neutral wire is

A

Blue

31
Q

Fuses are used to protect devices from

A

High current

32
Q

Fuses and Earth wires are used to

A

protect the user from electric shock

33
Q

Voltage of live wire

A

230V

34
Q

Voltage of Neutral wire

A

0V

35
Q

Electrical devices transfer

A

electrical energy to other forms of energy

36
Q

Work done is always equal to

A

the amount of energy transferred

37
Q

National Grid is

A

a system of cables and transformers that connect power stations to homes

38
Q

Step up transformers

A

increase voltage and lower current to make energy transfer more efficient (less heating of wires)

39
Q

Step down transformers

A

decrease voltage and increase current

40
Q

Internal Energy is

A

the energy stored inside a systems particles in the form of kinetic and potential energy of the particles themselves

41
Q

Heating increases

A

Internal energy

42
Q

Increases in internal energy can

A

cause temperature rise or change of state

43
Q

Latent heat is

A

the energy needed to change the state of a substance without changing the temperature

44
Q

Latent heat of fusion is

A

the energy needed to change a solid into a liquid

45
Q

Latent heat of vaporisation is

A

the energy needed to change a liquid to a gas

46
Q

Pressure of a gas is caused by

A

particles colliding with the surface of the container and pushing on it

47
Q

Size of atoms (radius)

A

1 x 10-10m

48
Q

Nuclei are smaller than atoms by this many times

A

10,000 times smaller

49
Q

Mass number

A

is the total number of protons AND neutrons in the nucleus

50
Q

Atomic number

A

The number of protons in an nucleus

51
Q

Isotopes

A

elements that can have different numbers of neutrons but same number of protons

52
Q

Ions

A

atoms that have lost or gained outer shell electrons

53
Q

Radioactive decay is

A

a random process

54
Q

Alpha particles

A

contain 2 neutrons and 2 protons

55
Q

Beta Particles

A

High speed electrons from nucleus

56
Q

Gamma rays

A

High energy Electromagnetic waves

57
Q

Half life

A

the time it takes for a samples activity or count rate to fall to half of its original value

58
Q

The rate at which radiation is emitted is called

A

Activity

59
Q

Radiation is emitted from

A

Unstable Nuclei

60
Q

Thermistor’s resistance decreases when

A

temperature increases

61
Q

LDR’s resistance decreases

A

as light intensity increases

New Spec Trilogy Paper 1 (1 decks)

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