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0
volts
time
base
OFF
0
volts
time
base
ON
4
volts
time
base
OFF
4
volts
time
base
ON
8
volts
time
base
OFF
8
volts
time
base
ON
Oscilloscope
screen
patterns
for
dc
voltages
-
4
volts
time
base
OFF
-4
volts
time
base
ON
Each
button
represents
an
input
voltage
signal
to
the
oscilloscope.
Press
to
see
what
the
signal
looks
like
on
the
oscilloscope
screen.
direct
current
sources
The
oscilloscope
is
a
kind
of
high
resistance
voltmeter.
It
displays
voltage
signals
by
an
electron
beam
which
strikes
the
oscilloscope’s
fluorescent
screen
producing
a
dot.
The
electron
beam
is
deflected
by
metal
plates
upwards
or
downwards
depending
on
the
size
of
the
voltage.
When
the
time
base
of
the
oscilloscope
is
switched
on
the
electron
beam
spot
is
swept
across
the
screen
producing
a
line.
www.mallonphysics.com
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Oscilloscope
Information
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Oscilloscope
Information
d.c.
voltages
A.C.
and
D.C.
Electricity
Oscilloscope
patterns
for
ac
voltages
4
volt
ac
peak
to
peak
time
base
OFF
4
volt
ac
peak
to
peak
time
base
ON
8
volt
ac
peak
to
peak
time
base
OFF
8
volt
ac
peak
to
peak
time
base
ON
Each
button
represents
an
input
voltage
signal
to
the
oscilloscope.
Press
to
see
what
the
signal
looks
like
on
the
oscilloscope
screen.
These
ac
signals
are
taken
from
a
signal
generator
set
at
a
frequency
of
20
Hz
and
peak
ac
voltage
of
4
or
8
volts.
The
ac
voltages
show
a
straight
line
above
and
below
the
zero
volts
line
when
the
time
base
is
off.
Its
length
being
equal
to
twice
the
peak
voltage
selected.
When
the
time
base
is
switched
on
a
sine
wave
is
produced
showing
the
voltage
changes
throughout,
going
from
the
maximum
value,
then
to
zero
and
then
to
minimum
negative
value.
A.C.
and
D.C.
Electricity
Changing
the
time
base
setting.
Click
the
buttons
below
to
change
the
time
base
setting.
10
milliseconds
20
milliseconds
5
milliseconds
Check
that
the
frequency
of
the
ac
voltage
signal
is
20
Hz.
The
frequency
of
the
ac
voltage
signal
is
unchanged.
When
you
increase
the
time
base
settings
you
will
increase
the
number
of
waves
on
the
oscilloscope
screen.
Note
that
the
frequency
of
the
ac
voltage
signal
remains
20
Hz
The
volt/div
setting
remains
unchanged
so
the
amplitude
of
the
ac
voltage
signal
remains
unchanged.
A.C.
and
D.C.
Electricity