Why does the power drop significantly when you put your hands on both ends of the dry battery for a

People can conduct electricity, so the amount of electricity will drop significantly.

Because the human body is also like an electrified object, the electricity that goes home attracts it.

Because the electricity is absorbed by the body, the amount of electricity is reduced.

Because the human body can conduct electricity, the battery discharges.

The human equivalent is a conductor, and the battery discharges.

Because the battery discharges and the person is a conductor.

The human body is also a conductor and likewise absorbs electricity.

Because the human body is an electrified object.

Because the electromotive force of the chemical power supply is generally relatively stable, the change with the decrease of reactant concentration and the increase of product concentration is not large, unless the concentration of reactant products is continuously decreasing (for example, NH3 generated in zinc-manganese dry batteries is adsorbed), or side reactions occur. According to Ohm's law of the whole circuit, E=I(R+R), when the resistance of the external circuit R remains unchanged, the voltage distributed by the battery ir=e-u becomes larger, so the voltage distributed by the external circuit (end-of-circuit voltage) u=ir=e-ir decreases.

Therefore, the battery will be used for a long time, and the voltage will be reduced.

The reactants in it will be lost, and the resistance will increase, and the voltage will naturally decrease.

Hello:——1. The battery is a chemical reaction battery, which is used over timeThe chemical reaction will gradually decreaseThe voltage will gradually decrease.

2. The battery will appear after a long timeThe internal resistance increasesThis is one of the reasons why the voltage gradually decreases.

According to the law of conservation of energy, the energy in the battery gradually decays, and the current and voltage decrease accordingly. Dry batteries convert chemical energy into electrical energy, and the voltage decreases continuously with the continuous consumption of its chemical energy; The situation is similar for rechargeable batteries, where the electrolyte concentration is polarized, and the result of electrochemical polarization is to increase the required voltage of the electrolytic cell and decrease the output voltage until it can no longer meet the normal power requirements.

Because the internal resistance of the battery has become larger.