Electricity Flashcards
Explain electric insulators
Something that electricity cannot flow throuvh
Explain electric conductors
Something electricity easily flows through
How do objects become neg- charged
Gain electrons
How do objects become pos+ charged
Loose electrons
What is the law of electric charge
Alike charged repel opposite attract
How are objects charged by friction
Rubbing together makes one object loose and the other gain e-
How are objects charged by contact
One charged object touches neutral object and transfers e-
How are objects charged by induction
Charged object repelling/attracting e- without touching
What is E and it’s units
Energy, joules (J)
What is Q and it’s units
Charge, coulombs (c)
What is V and it’s units
Potential differance, Volts, V
What is I and units
Current, Amperes, A
What is t and units
time, seconds, s
What is R and units
Resistance, ohms, omega symbol
What is P and units
Power, watts, w
How is voltmeters contacted in a circuit
Parrallel
How are ammeters connected in circuits
Series
Does current stay the same in series?
Yes
Does current stay the same in parrallel?
No
What happens if a bulb burns out in series?
Everything stops
What happens if bulb burns out in parrallel
Current decrease, bulbs stay on
What gives more resistance?
Longer wire, smaller diameter, less conductive, hot tempature
What is current?
Flow of electrons
What is potential differance?
Differance in electric potential energy per unit of charge measured at different any points in the circuit
