Science, Physics - Electricity & Energy (Heat) Flashcards
1
Q
static electricity
A
- because of the build-up of electric charge
- called ‘static’ energy because the charge is unable to flow
2
Q
how does static electricity happen
A
- 2 insulating materials are rubbed together => friction between materials cause charge to be transferred from 1 materials to the other
- one material has more electrons (negative charge)
- the other has less electrons (positive charge)
3
Q
negative or positive charge?
A
it depends on the object that gains or loses
4
Q
circuit
A
- path of electricity
- used everyday
5
Q
3 basic components of a circuit
A
- energy source: battery
- conductor: wires
- electrical load: bulb/buzzer
- switch (optional)
6
Q
types of circuits
A
- simple circuit
- parallel circuit
- series circuit
7
Q
simple circuit
A
- 3 basic components
-> energy source
-> conductor
-> electrical load
8
Q
parallel circuit
A
- 2 paths
9
Q
series circuit
A
- multiple electrical loads
- only one path
10
Q
current
A
- the measure of flow of charges (electrons) thru wires and components in one sec
- electrons will only flow out through the negative pole of battery
- measured in amps/ampere
- ammeter is the one used to measure
-> must be connected to the current to measure - written in A
11
Q
voltmeter measures ____
ammeter measures _____
A
voltage
current
12
Q
voltage
A
- potential difference (another word)
- a “pressure” that pushes electricity
- measured in volts (V)
13
Q
voltage or current ? (in circuits)
A
- series = voltage is shared
- parallel = currents are shared
14
Q
model (in circuits)
A
- scientists often use models to help them explain difficult concepts
15
Q
heat
A
- measured in Joules (J)
- temperature is HOW you measure heat
