Introduction:
In the study of the chemical effects of electric current, conduction testers are commonly used to check the flow of electric current through a given sample. These testers consist of two free ends, which are used to make connections with the sample. However, it is not advisable to keep the free ends connected for a long time. Let's understand why.

Reasons for not keeping the free ends connected for a long time:

1. Electrolysis:
When the free ends of a conduction tester are connected for a long time, electrolysis can occur. Electrolysis is a process in which the passage of electric current through a substance causes chemical changes. This chemical reaction can lead to the breakdown of the substance, resulting in the formation of new compounds. If the substance being tested is a liquid, electrolysis can cause the decomposition of the liquid into its constituent elements or ions.

2. Damage to the conduction tester:
Keeping the free ends of a conduction tester connected for a long time can also lead to damage to the tester itself. Continuous flow of electric current through the tester can generate heat, which may exceed the tolerable limit of the tester. This excessive heat can damage the internal components of the tester, rendering it ineffective or even causing it to malfunction.

3. Safety concerns:
Connecting the free ends of a conduction tester for a long time can pose safety risks. The flow of electric current through the tester can generate heat, and if the tester is not designed to handle high temperatures, it can potentially cause a fire hazard. Additionally, prolonged exposure to electric current can increase the risk of electric shocks, which can be dangerous or even fatal.

Conclusion:
In conclusion, it is essential to avoid keeping the free ends of a conduction tester connected for a long time due to the risk of electrolysis, potential damage to the tester, and safety concerns. It is best to disconnect the tester after use to prevent any unwanted chemical reactions, protect the tester from damage, and ensure personal safety.

If the free ends of conduction tester are connected for long time , The cell of the battery will drain very quickly