Electricity Flashcards
How is a thermistor affected by temperature?
as temperature increases, the resistance decreases
Voltage is also known as…
potential difference
What is the current in series?
it is the same in all components
What is the voltage in series?
the total potential difference = the sum of the potential differences across each components
What is the current in parallel?
the current flowing in a junction is equal to the current leaving it. The sum of the currents in each section is equal to the total current
What is the voltage in parallel?
they are the same across each branch
Where is a voltmeter placed in a circuit?
in parallel to the component being measured
Give an equation relating potential difference with energy transferred and charge
voltage = energy transferred / charge
A volt can also be descrived as a…
joule per coulomb
What is an electric current?
the rate of flow of charge
Where must an ammeter be placed in a circuit?
in series
What is the equation linking charge, current and time
charge = current * time
State the equation linking current, voltage and resistance
voltage = current * resistance
What is the relationship between current and resistence?
current is inversely proportional to resistance
State the equation linking electrical energy transferred, voltage, current and time
electrical energy transferred = current * voltage * time
