M3.2 Flashcards
1
Q
If a glass rod is rubbed with fur, what charge is the rod?
A
Negatively charged
2
Q
If a glass rod is rubbed with silk, what charge is the rod?
A
Positively charged
3
Q
Does a force field exist around every charged body?
A
Yes
4
Q
What happens if two like charges are next to each other?
A
They repel
5
Q
What colour does a thin helical filament bulb go?
A
White heat
6
Q
Does cross sectional area affect how much current passes through?
A
No
7
Q
What causes heat in a wire?
A
Cross sectional area and density
8
Q
What is current density?
A
The current per mm2
9
Q
What temperature must cables not exceed?
A
60.C
