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A GCSEs > Physics Paper 1 (Content) > Flashcards

Physics Paper 1 (Content) Flashcards

1
Q

What is half-life?

A

Time it takes for the count rate of a radioactive substance to halve

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2
Q

What is direct potential difference?

A
  • Also known as DC
  • One directional current flow
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3
Q

What is alternating potential difference?

A
  • Also known as AC
  • A continually oscillating current flow which which results in the potential difference across two points continually oscillating between
    a positive and negative value.
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4
Q

What is this symbol?

A

Thermistor

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5
Q

What do we need for charge to flow?

A
  • Circuit must be closed (No open switches)
  • Must be a source of potential difference (Battery/Cell)
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6
Q

What is the definition of specific heat capacity?

A

The energy required to increase the temperature of 1kg of water by 1^oC

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7
Q

What is current?

A

The flow of electrical charge

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8
Q

What is this electrical component?

A

Fuse

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9
Q

Explain why changing state is a physical change and not a chemical change.

A

Changes of state are physical changes not chemical changes because the substance recovers its original properties if the
change is reversed

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10
Q

Why is water changing to steam a physical change?

A

Water will recover its original properties if the steam is cooled

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11
Q

What is work done?

A

The energy transferred when a force acts over a distance

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12
Q

What is the national grid?

A

The network of power stations, transformers, and cables that connects consumers to power stations

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13
Q

What is resistance?

A

A measure of the opposition to current flow

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14
Q

What is the electrical component?

A

A cell

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15
Q

How many Amps in mA?

A

1000mA = 1 A (Amp)

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16
Q

What is amperes?

A

Amps = unit of current

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17
Q

What is nuclear fusion?

A

Nuclear fusion is the joining together of nuclei

During nuclear fusion the total mass of the particles increase (becomes heavier)

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18
Q

What is nuclear fission?

A

An unstable nucleus absorbs a neutron and splits into two parts

Two or three neutrons are released as well as energy and gamma rays

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19
Q

What stops gamma radiation?

A

A few cm of lead

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20
Q

What is a gamma ray?

A
  • = neutron (n)
  • Electromagnetic radiation from the nucleus
21
Q

What is sublimates (sublimation)?

A

Changing from solid to gas

22
Q

What are the units for resistance?

A

Ohms Ω

23
Q

What are the units for potential difference?

A

Volts

24
Q

What are the units for energy?

A

Joules (J)

25
Q

What are the units for current?

A

Amps (A)

26
Q

What is this electrical component?

A

LDR

Light-dependent Resistor

27
Q

What is this electrical component?

A

Diode

28
Q

What is this electrical component?

A

Resistor

29
Q

What is this electrical component?

A

Variable resistor

30
Q

What is this electrical component?

A

LED

Light emitting Diode

31
Q

What is a step-up transformer?

A

Device that increases the potential difference generated by a power station so that electrical power transmitted along the transmission cables is at higher potential

32
Q

What is this electrical component?

A

Battery

33
Q

What is a spring constant?

A

A measure of a springs stiffness

The greater the number the more force needed to stretch or compress a spring by a given distance

34
Q

What is a step down transformer?

A

Device found between the transmission cables and consumer that lowers the potential difference of the power stations so it is at safe usable levels

35
Q

What is a thermistor?

A

A temperature dependent component whose resistance increases as temperature decreases

36
Q

What is power?

A
  • The rate at which energy is transferred
  • Or the rate at which work is done
37
Q

What stops beta radiation?

A

A few sheets of aluminium

38
Q

What stops alpha radiation?

A

Piece of paper

39
Q

What is pressure measured in?

A

Pascals (Pa)

1000 Pa = 1KPa (kilopascals)

40
Q

What is the point of a live wire?

A

Live wire carries alternating potential difference from the supply

41
Q

What is the point of the neutral wire?

A

Neutral wire completes the circuit

42
Q

What is the point of an earth wire?

A

Safety wire to stop appliances becoming live

43
Q

What are the colours of each wire of the 3 core cable?

A
  • Live wire = Brown
  • Neutra wire = Blue
  • Earth wire = Green and Yellow Stripes
44
Q

How are ammeters connected in a circuit?

A

In series

45
Q

How are voltmeters connected in a circuit?

A

In parallel

46
Q

Which one of these is the lightbulb connected in series and which one is light connected in parallel?

A

LEFT = In series (on the same wire)
RIGHT = In parallel (on a different wire)

47
Q

Which one of these is the lightbulb connected in series and which one is light connected in parallel?

A

LEFT = In parallel
RIGHT = In series

48
Q

What is the units for extension?

A

Extension is a length
(m) - metres

49
Q
A

A GCSEs (7 decks)

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