Atoms Flashcards
1
Q
Atoms Can combine to form
A
Molecules
2
Q
Balanced charge:
A
– Electrons equal protons
• Electrons do not flow
3
Q
• Unbalanced charge:
A
– Negative charge: more electrons than protons
– Positive charge: more protons than electrons
• Allows electrons to flow
4
Q
Free electrons
A
– easily leave their orbits
5
Q
• Materials with free electrons are
A
– conductors
6
Q
• Copper atoms have
A
– one free electron
7
Q
Free electrons can be forced to
move from atom to atom by:
A
- Friction
• Example: Static electricity - Chemically
• Example: Batteries - Magnetically (induction)
• Example: Generators
8
Q
Ohms law
A
1 volt will push 1 amp through 1 ohm of resistance
9
Q
Power is the rate
A
at which work is done
10
Q
• Power = Intensity x Electromotive force
•
A
• P = IE
Power (watts) = Amps x volts
11
Q
• Power = Intensity x Electromotive force
•
A
• P = IE
Power (watts) = Amps x volts
12
Q
Power
A
I squared x R
