Physics Unit (gr 9 science)
What do ohms measure?
Resistance
What do volts/voltage (V) measure
Potential Difference
What do amperes (A) measure?
Current
If you have the current and resistance, what is the equation to find potential difference?
I x R
If you have the potential difference and resistance, what is the equation to find current?
V / R
If you have the current and potential difference, what is the equation to find the resistance?
V / I
The change of energy level in a charge when it moves thorugh a load of the source.
Potential Difference
The flow of charges through a circuit.
Current
The hindering that happens to a charge while it moves through a load.
Resistance
does current or potential difference divide in a parallel circuit?
current
does current or potential difference divide in a series circuit?
potential difference
If current from the source decreases when loads are added, is it a series or a parallel circuit?
series
If the circuit has multiple branches of current, is it series or parallel?
parallel
If a lightbulb dims when more loads are added, is it a series or parallel circuit?
series
If lightbulb brightness does not change when loads are added, is it series or parallel?
parallel
Is a voltmeter placed parallel or on the branch of a circuit?
parallel
Is an ohmeter placed parallel or on the branch of a circuit?
parallel
Is an Ammeter placed parallel or on the branch of a circuit?
Branch
What does an energuide label tell us?
electrical efficiency
If a circuit is cool (cold), will the resistance be higher or lower?
Lower
If a circuit has thick wires, will the resistance be higher or lower?
Lower
If a circuit has thin wires, will the resistance be higher or lower?
Higher
If a circuit has long wires, will the resistance be higher or lower?
Higher
If a circuit has short wires, will the resistance be higher or lower?
Lower
If a circuit is made of copper, will resistance be higher or lower?
Lower
If a circuit is made of aluminium, will the resistance be higher or lower?
Higher
What are the 4 things loads can turn energy into?
movement, sound, light & heat