Q. Electric battery is a device that generates emf by chemical action.
Q. In a primary cell chemical action is reversible.
Q. The depolarizer in a carbon zinc cell converts the hydrogen produced into water.
Q. The cell, which is commonly used as standard cell is mercury cadmium cell.
Q. The internal resistance of a cell is assumed to remain constant irrespective of the load current delivered by the cell.
Q. The internal voltage drop of a voltage source is independent of load current supplied.
Q. The law that finds application in electrolysis is Faraday law.
Q. For all substances the ratio of electrochemical equivalent to chemical equivalent is the same and is equal to 0.01036.
Q. During charging of a lead acid cell the specific gravity of a cell decreases.
Q. Faure or pasted plates are lighter in weight and cheaper in cost than formed or plante plates.
Q. The grids of positive plates are lighter than those of negative plates.
Q. There is always one more positive plate than the negative plates in lead-acid batteries.
Q. In a lead acid battery the positive terminal is of comparatively larger diameter than that of negative terminal.
Q. To prevent local action in a battery, only distilled water is used in electrolytes.
Q. Charging of sulphated battery produces very little heat.
Q. A sulphated battery should be charged always for a longer period at low rate.
Q. Undercharging of a lead acid battery causes increase in specific gravity of the electrolyte.
Q. In constant current charging method the supply voltage is reduced as the battery gets charged.
Q. In constant voltage charging, charging current increases as the battery gets charged.
Q. The emf of a storage battery depends upon the size of the electrodes.
Q. The plates of alkaline cells do not buckle or swell.
Q. The capacity of Edison cell decreases when its electrolyte is exposed to air.
Q. Edison cells cannot be kept in discharged condition for a long period.
Q. Short circuits in alkaline cells do not reduce the life.
Q. When two cells are connected in parallel, it should be ensured that they have equal emfs.
Q. Static electricity is produced by friction.