Physics Flashcards Part 2

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1
Q

What is current measured in?

A

Amps, A

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2
Q

What is electrical current? (Two)
What is its symbol?

A
  • The movement of charge
  • The size of the current tells us how much charge moves past a point every second
  • Symbol is A
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3
Q

What is resistance measured in?

A

Ohms, Ω

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4
Q

Three factors of energy transfer

A
  • Mass of material used
  • The temperature change
  • The type of material used
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5
Q

What do waves transfer?
What do waves not transfer?
What is a light wave?

A
  • Energy and information
  • Any matter or particles
  • Transverse
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6
Q

What is UV used for?
What are X Rays used for?
What are gamma rays used for?

A
  • Used in sun beds (tanning)
  • To look for broken bones
  • To kill cancer cells during radiotherapy
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7
Q

Alpha particles have how many neutrons and protons? Are they positively or negatively charged?

A

Two and Two .
They are positively charged.

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8
Q

Are Beta particles positively or negatively charged?

A

Negative

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9
Q

What charge do Gamma particles have?

A

Neutral

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10
Q

Why would insulation affect energy transfer (Three)?

A
  • Low thermal conductivity of brick and insulation
  • The wall is thick/has more layers
  • rate of energy transfer is lower/ less energy is transferred by conduction
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11
Q

Gas boiler - how are different energy stores affected? (Three)

A
  • Chemical energy store decreases
  • Thermal energy store of water increases
  • Thermal energy store of the atmosphere increases
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12
Q

REMEMBER How many Joules in MJ (N.b. How to convert to joules)

A

1 million (so times by 1 million)

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13
Q

REMEMBER When given minutes convert to:

A

Seconds

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14
Q

How many Joules in KJ (N.B. remember to convert)

A

1000

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15
Q

What is a variable resistor

A

Electrical component that gives you control over the current flow through a circuit

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16
Q

What is a Thermistor

A

Type of resistor that changes its resistance based on the temperature

17
Q

What is a diode?

A

Circuit component that only allows current to flow in one direction

18
Q

What is a resistor?

A

Limits passage of electrical current

19
Q

What is a fuse in a circuit?

A

Breaks the circuit if a fault in a circuit causes too much current to flow

20
Q
A