physics Flashcards
What is current measured in?
)
Current is measured in Amps (A
What is the unit of voltage?
The unit of voltage iare Volts (V)
What is the unit for resistance?
The unit for resistance is ohms
What is the unit of power?
)
The unit for power is watts (W
What is the unit of Energy?
The units of energy is Joules (J)
What is the equation for ohms law?
The equation for ohms is V=IxR
What is the electrical current a flow of?
An electrical current is a flow of electrons.
In which direction does a conventional current flow?
A convectional current flows from positive to negative.
why does a lamp light up when a switch is closed?
.
A lamp lights up when a switch is closed because there is a continuous path of metal for the electric current to flow around
what do you use to measure volts?
You use a voltmeter to measure volts .
Recall and use the relationship between charge, current and time:
Charge = Current × time Q = I × t
what do we two or more cells are connected together
battery
what is a series circuit
They make a simple loop for the current to flow round.
what is a parallel circuit
current is shared
between the
components
The ‘electrical push’ which the cell gives to the current is called the
the voltage. It is measured in volts (V) on a voltmeter
