1.1 The "Electricity 2" set is intended for basic law demonstrations investigated on the "Electric current in semiconductors" theme in a course of physics at a secondary school, and for acquaintance of pupils with semiconductor and primary automate semiconductor devices.
1.2 The set is applied to demonstrate experiments in standard physics classroom conditions at a secondary school, a technical training college or a technical school.
Set details provide an opportunity to assembly an electric circuit at a vertical plane.
The set with the help of molded magnets in the bases demountable modules by the size of 110х110 mm can be mounted at a metal blackboard or at a screen surface from the static material. Electric circuit elements installed on each of these modules.
Module plugs for connecting wires are disposed and legends of elements are put at a module face.
Wires with Ж4 mm round unipolar tip or with a flat plug can be used as connecting wires.
It is necessary to avoid usage of force at photoelectric cell plate, light-emitting diode radiator and photoresistor case.
4. Technical data
Module size for circuit element installation - 11 х 11 cm
Fastening type - Magnetic
Maximum permissible current in transistor load circuit 2А
Maximum permissible current in diode load circuit 2А
Maximum permissible current in thermoresistor load circuit 10mА
Maximum permissible current through wire resistors - 3A
Service life - ≥ 7 years
5. Demonstration experiment list
· Semiconductor resistance and temperature dependence.
· Semiconductor resistance and illumination dependence.
· Unidirectional conduction of semiconductor diode.
· Light-emitting diode study.
· The transistor.
· Transistor key operating mode.
· Electrical signal multiplication by the transistor.
· Photorelay effect.
· Thermorelay effect.
· Current source on the basis of a semiconductor photoelectric cell.
6. Possible malfunctions and their elimination
There is no contact in a wire connection place
Increase a tip gap of the pin with the help of the 4х0,25 mm plane screw-driver.
Test plug fastening on the board element. Tight a fixing nut with the help of the #7 face key if necessary.
Lamp does not work
Replace the lamp: slightly press into patron, turn it counter-clockwise and take out from the patron. Lamp installation goes in the reverse order.
7. The equipment necessary for operation with the set:
· the "Electricity 1" demonstration set;
· DC source up to 6А with the 2-15V adjustable voltage
· current and voltage digital instruments package
· connecting wire demonstration package
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