Current Flashcards
1
Q
What is “current?”
A
- Current is the flow of charge.
2
Q
How do electrons move in a circuit?
Conventional current
A
- From positive to negative.
3
Q
How is current measured?
A
- The number of electrons that pass a fixed point each second/ rate of flow of charge.
4
Q
Where are the electons found in a circuit?
A
- They are found in the wires of metal
Delocalised electrons
5
Q
What is the equation that links charge, time and current?
A
- Q=IT
Charge = Current x time
6
Q
What 2 parts of a circuit have electrons in them?
A
- Metal Components
- Metal wires
7
Q
What is meant by “rate?”
A
- Per unit time
8
Q
What are the 3 types of ammeters?
A
- Analog
- Digital
- Multimeters
9
Q
What are multimeters?
A
- Multimeters are electrical measuring devices that can act as ammeter/ voltmeter.
10
Q
Describe the current in a series circuit.
A
- Current is the same all around series circuit.
11
Q
Describe the current in parallel circuit?
A
- Current is split between branches/ electrons split.
- Not always excatly half*
12
Q
What is the advantage of using parallel circuits in christmas lights?
A
- If one bulb breaks, it doesn’t cut off all of circuit.
13
Q
What does the cell do in a circuit?
A
- It provides the potential difference for the circuit.
14
Q
What is another way of writing 1A?
A
1C/s
