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AQA GCSE Science > deck_15340834 > Flashcards

deck_15340834 Flashcards

1
Q

In a series current what is the same and what is different?

A

Current same Volatge shared

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2
Q

In a parallel circuit what is the same and what is different?

A

Current shared and Voltage same.

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3
Q

What colour is the earth wire?

A

Yellow and green

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4
Q

What colour is live wire?

A

Brown

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5
Q

What colour is neutral wire?

A

Blue

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6
Q

What does live wire do?

A

The live wire carries the alternating potential difference from the
supply

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7
Q

What does neutral wire do?

A

The neutral wire completes the circuit.

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8
Q

What does earth wire do?

A

The earth wire is a
safety wire to stop the appliance becoming live.

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9
Q

What is an beta particle?

A

a high speed electron ejected from the
nucleus as a neutron turns into a proton

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10
Q

In a series circuit what is the total resistance?

A

the total resistance of two components is the sum of the
resistance of each component.

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11
Q

Key fact for parallel cicuit for resistance?

A

the total resistance of two resistors is less than the resistance
of the smallest individual resistor.

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12
Q

What do you do to get from ma to A

A

/1000

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13
Q

How are ameter added to a circuit?

A

ammeter in series with the compotent

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14
Q

How are voltmeter added to a circuit?

A

In parallel with the compotent

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15
Q

What does a diode do?

A

Only lets current flow in 1 direction high resistance in 1 direction and low resistance in another direction

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16
Q

What does a step up transformer do?

A

Increases the voltage which in turn decreases current reducing the power lost due to heating in the c able

17
Q

How do power station produce there energy?

A

At high current

18
Q

What does a step down tansformer do ?

A

Decrease voltage to make it safe for households

19
Q

What is solid to gas called?

A

Sublimation

20
Q

What is internal energy?

A

The sum of the potential energy + kinetic energy

21
Q

Who did the gold foil experiment?

A

Rutherford

22
Q

Who created plum pudding?

A

JJ Thomoson

23
Q

Who discovered nucleus is posotive charge?

A

Rutherford

24
Q

Who discoverd outer electron shell and electron?

A

Neils Bohr

25
Q

Who discoverd neutrons?

A

James Chadwick

26
Q

What is the particle for alpha decay?

A

Helium or 2 proton +2 neutron

27
Q

What stops beta particle?

A

few mm of alluminium

28
Q

What stops Alpha particle

A

Paper

29
Q

What is radioactivity?

A

Is the rate of decay in a sample of radioactive material.

30
Q

What do Unstable nuclei do?

A

Will decay to be more stable,emmiting radiation in the process.

31
Q

What is the unit of activity for a radiactive substance?

A

Becquerel or Counts per second

32
Q

What is half life?

A

time it takes for half the radioactive nuclei to decay.

AQA GCSE Science (5 decks)

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