Unit 2 - Electricity Flashcards
Electrons move from..?
the negative terminal of a battery to the positive terminal.
Electrons have a what charge?
Negative
Protons have a what charge?
Positive
Neutrons have a what charge?
Neutral
What is the equation for Charge?
Charge = Current x Time
Q = I x t
Time is measured in..?
Seconds
Charge is measured in..?
Coulombs
Current is measured in..?
Amps
Voltage/Potential Difference is measured in..?
Volts
Resistance is measured in..?
Ohms
Current is..
the rate of flow of charge.
Charge is..
Charge is the amount of electricity travelling through a circuit.
Energy (in a circuit) is..
the work done by the source of electricity to maintain the rate of flow of charge in a circuit.
Voltage/ Potential Difference is..?
The difference in potential between two points of a circuit. Causes a current to flow.
Resistance is..?
the force slowing down the current.
1V = ?
1J/C
Voltage (Potential Difference) Symbols and Units
Quantity Symbol - V
Unit = Volt
Symbol for Unit - V
Energy Transferred (Work Done) Symbols and Units
Quantity Symbol - E
Unit - Joule
Symbol for Unit - J
Charge Symbols and Units
Quantity Symbol - Q
Unit - Coulomb
Symbol for Unit - C
What is the equation for Energy Transferred?
Energy Transferred = Charge x Voltage
E = Q x V
Energy Transferred = Current x Voltage x Time
E = I x V x t
What is the equation for Power?
Power = Current x Voltage
P = I x V
The higher the Potential Difference of the source..?
the greater the push, therefore the current increases.
Any electrical component with resistance causes?
The current in the circuit to decrease
Electrical energy to be transferred away from the charge (it is lost as thermal energy)
What is Ohms Law in words?
Ohms Law states electric current is proportional to voltage and inversely proportional to resistance.