Physics Flashcards Part 2
What is current measured in?
Amps, A
What is electrical current? (Two)
What is its symbol?
- The movement of charge
- The size of the current tells us how much charge moves past a point every second
- Symbol is A
What is resistance measured in?
Ohms, Ω
Three factors of energy transfer
- Mass of material used
- The temperature change
- The type of material used
What do waves transfer?
What do waves not transfer?
What is a light wave?
- Energy and information
- Any matter or particles
- Transverse
What is UV used for?
What are X Rays used for?
What are gamma rays used for?
- Used in sun beds (tanning)
- To look for broken bones
- To kill cancer cells during radiotherapy
Alpha particles have how many neutrons and protons? Are they positively or negatively charged?
Two and Two .
They are positively charged.
Are Beta particles positively or negatively charged?
Negative
What charge do Gamma particles have?
Neutral
Why would insulation affect energy transfer (Three)?
- 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
Gas boiler - how are different energy stores affected? (Three)
- Chemical energy store decreases
- Thermal energy store of water increases
- Thermal energy store of the atmosphere increases
REMEMBER How many Joules in MJ (N.b. How to convert to joules)
1 million (so times by 1 million)
REMEMBER When given minutes convert to:
Seconds
How many Joules in KJ (N.B. remember to convert)
1000
What is a variable resistor
Electrical component that gives you control over the current flow through a circuit
