A standard motor car battery is a lead-acid battery. It typically operates at 12 volts (composed of six 2-volt cells connected in series). The electrolyte is a dilute solution of sulfuric acid (H₂SO₄). The electrodes are made of lead (Pb) and lead dioxide (PbO₂). The capacity of a battery, representing how much charge it can store, is expressed in Ampere-hours (Ah).
Consider the following statements regarding a motor car battery: I. The voltage is usually 12 V. II. Electrolyte used is hydrochloric acid. III. Electrodes are lead and copper. IV. Capacity is expressed in ampere-hour. Which of the above statements are correct?
Asked in UPPCS Prelims 1999 · Topic: Electric Current (Electromotive Force (EMF) and internal resistance of a cell)
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