Practical Labs
Impedance
Weighing Air
Compression & Expansion
Boiling Point Versus Pressure
Alternating Current Impedance
Three loads wired in series
Alternating Current Impedance
One resistive – a light
One capacitive – a capacitor
One Inductive – a motor
Alternating Current Impedance
Switches are added in
parallel with the capacitor
and motor.
Closing a switch causes
current to bypass the load
Resistance
Voltage and
current are in
phase in a
resistive circuit.
With both switches closed
the current bypasses both
the inductive and
capacitive loads.
Inductance
Voltage peaks
before current
in an inductive
circuit.
The motor becomes part
of the circuit when its
switch is opened – adding
inductance to the circuit.
Capacitance
Voltage peaks
after current in a
capacitive
circuit.
The capacitor becomes
part of the circuit when its
switch is opened adding
capacitance to the circuit.
Inductance & Capacitance
Voltage and current
are in phase in a
circuit with
capacitance
offsetting inductance
Both the capacitor and the
motor becomes part of
the circuit when their
switches are opened.
Inductance & Capacitance
Click on either switch
to change the switch
position
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Capacitance
Click on either switch
to change the switch
position
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Inductance
Click on either switch
to change the switch
position
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Resistance
Click on either switch
to change the switch
position
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Weighing Air
Evacuate Cylinder with Vacuum Pump
Weighing Air
Set Scale to Pounds and Ounces
0 lbs 0.0 ozs
Weighing Air
Place Evacuated Cylinder on Scale
28 lbs 10.5 ozs
Weighing Air
Zero Scale with Tank
0 lbs 0.0 ozs
Weighing Air
Open Valve To Let Air In
0 lbs 1.0 ozs
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Compression & Expansion
Attach Bicycle Pump To Tank
Compression & Expansion
Pump Tank Pressure to 40 psig
40 psig
Compression & Expansion
Measure Temperature of Line Entering Tank During compression
100°F
Compression & Expansion
Close Valve on Tank and Let Tank Sit for 10 Minutes
Wait 10
Minutes
Compression & Expansion
Open Valve on Tank and Measure Temperature at Valve Outlet
60°F
Outlet
Air
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Boiling Point Versus Pressure
Open Valve on Tank and Measure Temperature at Valve Outlet
Put water in flask.
Boiling Point Versus Pressure
Open Valve on Tank and Measure Temperature at Valve Outlet
Stopper flask and connect hose from flask side port to vacuum pump.
Boiling Point Versus Pressure
Open Valve on Tank and Measure Temperature at Valve Outlet
Start vacuum pump and water boils.
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