10.6 Measuring electricity Flashcards
How is charge detected
when electrons flow through an ammetre
Voltage
Voltage is a measure of the amount of force
needed to move electrons in
the circuit.
What instrument is voltage measured with
Voltmeter
what type of circuit is ammeter connected in
series circuit because an ammeter needs to be in line with the rest of the circuit components,
What type of circuit is voltage connected to
Parallel circuit because a voltmeter compares the
energy or electrons before and
after they travel through a load
Is a voltmeter attached to the circuit
voltmeters are not part of
the circuit themselves, but
instead attach across the
component being tested, parelle to the circuit
Supply voltage
is the “push” provided to the circuit by the
power supply
Describe how an ammeter must be connected in an electric circuit and state which terminal of the ammeter must be connected closest to the positive terminal of a battery.
An ammeter should always be connected in series in an electrical circuit.
The positive terminal of the ammeter should always be connected so that it is closer to the positive terminal of the power supply than the negative terminal of the power supply.
Explain why voltmeters and ammeters have two or three scales.
Multiple scales allow voltmeters and ammeters to be read to a higher degree of precision over different value ranges.
Describe one way in which random errors can be reduced on an ammeter or voltmeter
repeating measurements numerous times and calculating an average.
Describe two causes of random errors that occur when reading scales to measure any physical quantity.
estimation errors
random fluctuations in the voltage
Voltage can also be the measure of
the amount of electrical energy gained or lost by electric charge as it moves through the circuit
