P2 Physics - static energy, current and voltage Flashcards
1
Q
what happens when a substance loses electrons?
A
it becomes positively charged
2
Q
what happens when a substance gains electrons?
A
it becomes negatively charged
3
Q
if the charges of a substance are the same what happens
A
they repel
4
Q
if the charges of a substance are opposite what happens
A
they attract
5
Q
when can a current flow?
A
when an electric charge flows through a resistor
6
Q
what is current measured in?
A
amps
7
Q
what is current measured with?
A
an ammeter
8
Q
what is voltage measured in
A
volts
9
Q
what is is voltage measured with?
A
voltmeter
