8.4 Voltage Flashcards
1
Q
What’s voltage
A
Amt of energy supplied to free electrons by electricity source
2
Q
Relationship between voltage and energy supplied
A
Higher voltage, more energy supplied to free electrons
3
Q
Measure voltage, unit
A
Voltmeter, volt (V)
4
Q
Terminal colours, connect
A
Positive red
Negative black
加連加 減連減
5
Q
Total voltage =?
A
Sum of voltage of all cells
6
Q
Voltage affect current
Brightness when voltage increases
A
Current increases w voltage
Increases
7
Q
Cells VS current VS brightness
A
More cells, more voltage, current increases, brightness increases
8
Q
Relationship between voltage and current
A
Higher voltage higher current
