A good electric cell should have the following except
Answer Details
The statement in the question suggests that one of the given options is not a desirable characteristic of a good electric cell. A good electric cell is a device that converts chemical energy into electrical energy through a series of chemical reactions. The cell must have two electrodes, a positive and a negative, and an electrolyte that can conduct ions between the electrodes.
The first option, "A minimum of polarization effect", is a desirable characteristic of a good electric cell. Polarization occurs when the buildup of reaction products at the electrodes causes a decrease in the rate of the chemical reaction, leading to a decrease in the voltage of the cell. A good electric cell should minimize polarization effects to maintain a steady voltage output.
The second option, "A long life", is also a desirable characteristic of a good electric cell. A good electric cell should be able to provide a consistent voltage output over an extended period of time without the need for frequent replacement or recharging.
The third option, "A cheap and safe electrolyte", is also a desirable characteristic of a good electric cell. The electrolyte should be readily available and inexpensive, and it should not pose a safety hazard to users.
The fourth option, "Cost and dangerous of the cell", is not a desirable characteristic of a good electric cell. A good electric cell should not be excessively expensive, and it should not pose a safety risk to users.
Therefore, the correct answer is "Cost and dangerous of the cell".