Notesale: Turn your study into money

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Unit 17- Assignment 5- P7

Light level

By looking at the bar chart, can see that the room with the greatest light level is B147
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Measure the voltage of a capacitor-resistor network as
the capacitor discharge
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The difference is that the analogue voltage drains even when it is not connected,
unlike the digital voltage
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Whereas the analogue voltmeter has a fairly low resistance and take more energy
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• Both analogue and
digital voltmeters are
connected in parallel
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• An analogue voltmeter
as a fairly low
resistance
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• An analogue voltmeter
moves a pointer across
a scale in proportion
to the voltage of the
circuit
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Digital voltmeter
• Both analogue and
digital voltmeters have
a resistance
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A digital voltmeter
uses very little energy
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A digital voltmeter
shows the voltage on a
digital screen
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Because of the high
resistance level of
digital voltmeters,
they give a more
accurate reading,
especially at higher
voltages
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Circuit 2: Comparing digital and analogue thermometers

The temperature readings on both thermometers decrease at the same rate, however, the analogue
thermometer had a higher reading through most of the ten minutes
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All you have to
do is put the
thermometer in the
water
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There may
also be parallax error
when looking at an
angle
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takes time to respond
to the temperature
change
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An analogue
thermometer does
not measure above
100oC
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Digital thermometer
Advantages:
This responds to the
temperature change
almost instantly
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The metal
probe is also very
small in size
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Disadvantages:
A digital thermometer
requires power, unlike
an analogue
thermometer
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A digital thermometer
has to be calibrated to
keep accurate
readings
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A voltmeter is an instrument used for measuring electrical potential difference between two points
in an electric circuit
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Digital voltmeters give a numerical display of voltage by use of an analogue to digital
converter
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It is now the most common type of oscilloscope in use because of
the advanced trigger, storage, display and measurement features which it typically provides
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Storage oscilloscope

Differences

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•

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An analogue voltmeter
does not display
signals - voltages that
are functions of time
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An analogue voltmeter
cannot import the
recorded data into the
computer, unlike the
storage oscilloscope
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Instead, an
oscilloscope displays
signals - voltages that
are functions of time
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The storage
oscilloscope costs
much more than the
analogue voltmeter
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If someone were to use a stopwatch, then
they would not measure the exact time and oscillation of a spring would take
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The time it takes for electrical impulses to travel
through out body and for our body to react for them, would make the test inaccurate
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The data logger has a lot of sensors to sense every movement and the force used
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A data logger is useful because after you have carried out the experiment, the data collected can be
outputted to a computer and stored there
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Also the data collected by the data logger is numerical and
graphical and easy to read
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Time intervals for collecting data can be very regular and frequent
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By doing this, you can monitor every single change and
fluctuation of your results and at the exact time
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On the other hand, before an individual would carry an experiment out with a data logger, they
would need training so that they are using it correctly
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However, you do not need much training to use a stopwatch and
write down data in the correct format
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If data loggers break down or malfunctions, then recorded data could be lost
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This would not happen if the data was taken manually
with a stopwatch
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This would cause the results to be inaccurate
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Stopwatches would be more reliable on power, as there is a low possibility that they
would stop working during an experiment
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This is because of its accurate readings and recording of graphical and numerical data

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