Battery | True-False Questions

Q. Electric battery is a device that generates emf by chemical action.

Answer
True

Q. In a primary cell chemical action is reversible.

Answer
False

Q. The depolarizer in a carbon zinc cell converts the hydrogen produced into water.

Answer
True

Q. The cell, which is commonly used as standard cell is mercury cadmium cell.

Answer
True

Q. The internal resistance of a cell is assumed to remain constant irrespective of the load current delivered by the cell.

Answer
True

Q. The internal voltage drop of a voltage source is independent of load current supplied.

Answer
False

Q. The law that finds application in electrolysis is Faraday law.

Answer
True

Q. For all substances the ratio of electrochemical equivalent to chemical equivalent is the same and is equal to 0.01036.

Answer
True

Q. During charging of a lead acid cell the specific gravity of a cell decreases.

Answer
False

Q. Faure or pasted plates are lighter in weight and cheaper in cost than formed or plante plates.

Answer
True

Q. The grids of positive plates are lighter than those of negative plates.

Answer
False

Q. There is always one more positive plate than the negative plates in lead-acid batteries.

Answer
False

Q. In a lead acid battery the positive terminal is of comparatively larger diameter than that of negative terminal.

Answer
True

Q. To prevent local action in a battery, only distilled water is used in electrolytes.

Answer
True

Q. Charging of sulphated battery produces very little heat.

Answer
False

Q. A sulphated battery should be charged always for a longer period at low rate.

Answer
True

Q. Undercharging of a lead acid battery causes increase in specific gravity of the electrolyte.

Answer
False

Q. In constant current charging method the supply voltage is reduced as the battery gets charged.

Answer
False

Q. In constant voltage charging, charging current increases as the battery gets charged.

Answer
False

Q. The emf of a storage battery depends upon the size of the electrodes.

Answer
False

Q. The plates of alkaline cells do not buckle or swell.

Answer
True

Q. The capacity of Edison cell decreases when its electrolyte is exposed to air.

Answer
True

Q. Edison cells cannot be kept in discharged condition for a long period.

Answer
False

Q. Short circuits in alkaline cells do not reduce the life.

Answer
True

Q. When two cells are connected in parallel, it should be ensured that they have equal emfs.

Answer
True

Q. Static electricity is produced by friction.

Answer
True
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