Principle

This experiment should impart the knowledge, that a collector
current only flows through a transistor when the correct polarity
of the collector voltage is chosen and a base voltage of correct
polarity is applied. For an npn transistor, both the collector and
base must be connected to the positive pole. The emitter is here in
each case the reference electrode.

Prior to carrying out the experiment, the students should be
familiarised with the designations of transistor electrodes, as
well as the meaning of the term npn transistor. The comparison of
the base current, which can be estimated from the size of the base
resistance and the applied voltage, with the collector current,
which causes the lamp to light up, also leads to the conclusion
that a minimal base current is sufficient to make the transistor
conductive.

Benefits


No additional cable connections between the building blocks needed - clear arragned and quick setup

Contact saftey due to puzzle blocks system

Corrosion-free gold plated contacts

Doubled earning sucess: Electric circuit diagram on top, real components can be seen unterside



Tasks

With which voltage is an npn transistor to be operated?

Examine which polarity the collector voltage and the base
voltage of an npn transistor must have for a collector current to
flow.