Teaching experimental instrument for conductivity of objects

The utility model relates to a teaching experimental instrument for conductivity of objects, the structure of which is as follows: a base is respectively provided with a battery box, a bulb, a switch and two probes; a triode current amplifying circuit is arranged in the base; the triode current amplifying circuit is respectively and electrically connected with the bulb, the switch, the two probes and a contact electrode on the battery box. The teaching experimental instrument for conductivity of objects is safe, sensitive and accurate in use, can test the theory that objects such as human bodies, the earth, impure water and the like are also conductors, leads teachers to be capable of demonstrate relevant basic scientific knowledge safely, intuitively and accurately by experiments, meets the teaching requirement in classes of middle schools and primary schools, avoids cognitive disorder for students, and combines classroom teaching with experimental test.