Current, potential difference and resistance Flashcards
What is current?
The rate of flow of charge
What is charge measured in?
Coulombs, C
Parts in a circuit are called?
Components
How much is a coulomb?
A very large number of electrons
What is the units for potential difference?
Volts, V
What is resistance?
Anything that slows down the flow of charge
What is resistance measured in?
Ohms (Ω)
What does a battery consist of?
Cells
A parallel circuit current splits depending on what?
Its Resistance
What does the symbol Q represent?
Charge
Which type of circuit can current flow around?
A closed circuit
What does the symbol I stand for in an equation
Current
What does the symbol T stand for?
Time
What happens to resistance in filament light bulb?
As the current increases, the resistance decreases.
What is potential difference?
The driving force that pushes the charge around a circuit
What is electromotive force?
The energy provided by a cell or battery
What is the unit for potential difference (v)?
Voltage (V)
What is the unit for current?
Amps
What is current measured in?
Amps (amperes)
What is the resistance units?
Ohms (Ω)
What does LDR stand for?
Light dependent resistor
What does an LDR depend upon?
Light intensity
Resistance in a single circuit?
V=IR
The resistance of a thermistor depends upon?
Temperature
