Practical Labs ImpedanceWeighing Air Compression & ExpansionCompressionBoiling Point Versus Pressure.

Practical Labs

Alternating Current Impedance

Three loads wired in series

Alternating Current Impedance

One resistive – a lightOne capacitive – a capacitorOne 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

With both switches closed the current bypasses both the inductive and capacitive loads.

Voltage and current are in phase in a resistive circuit.

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

The capacitor becomes part of the circuit when its switch is opened adding capacitance to the circuit.

Voltage peaks after current in a capacitive 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 AirEvacuate Cylinder with Vacuum Pump

Weighing AirSet Scale to Pounds and Ounces

0 lbs 0.0 ozs

Weighing AirPlace Evacuated Cylinder on Scale

28 lbs 10.5 ozs

Weighing AirZero Scale with Tank

0 lbs 0.0 ozs

Weighing AirOpen Valve To Let Air In

0 lbs 1.0 ozs

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Compression & ExpansionAttach Bicycle Pump To Tank

Compression & ExpansionPump Tank Pressure to 40 psig

40 psig

Compression & ExpansionMeasure Temperature of Line Entering Tank During compression

100°F

Compression & ExpansionClose Valve on Tank and Let Tank Sit for 10 Minutes

Wait 10 Minutes

Compression & ExpansionOpen Valve on Tank and Measure Temperature at Valve Outlet

60°F Outlet

Air

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Boiling Point Versus PressureOpen Valve on Tank and Measure Temperature at Valve Outlet

Put water in flask.

Boiling Point Versus PressureOpen Valve on Tank and Measure Temperature at Valve Outlet

Stopper flask and connect hose from flask side port to vacuum pump.

Boiling Point Versus PressureOpen Valve on Tank and Measure Temperature at Valve Outlet

Start vacuum pump and water boils.

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