Physics Electricity Topic- Key Knowledge Flashcards
1
Q
What is current?
A
The rate of the flow of charge
(How much charge passes by each second)
2
Q
What does an ammeter measure?
A
Current (Amps)
3
Q
What is voltage?
A
The energy gained or lost per unit charge
(The energy gained or lost when one coulomb of charge passes through that component)
4
Q
What does a voltmeter measure?
A
Voltage
5
Q
The total voltage across the components is equal to..
A
The voltage of the cell
6
Q
What is a diode?
A
A component that only allows current to flow in one direction
7
Q
What carries the current?
A
Delocalised electrons
8
Q
As heat increases, resistance..
A
Increases
9
Q
Plan an investigation to show how current varies with voltage for a component
A
- Vary voltage across component
*Measure the current on the ammeter
*measure the voltage on the voltmeter
*Take repeat experiments and average
