Batteries - Electrical Engineering (MCQ) questions and answersThe container of the battery must be mechanically very strong and there should not be any leak. These are all the major things that we are considered while making a battery container. Hence, the above mentioned all the three material can provide the mechanical strength to the container because all the material are basically strong in nature. Active materials of a lead acid cell are spongy lead. The materials which all are participated in the electrochemical charge and discharge reaction are called as active elements of a lead acid cell. These materials include electrolyte and the positive and negative electrodes.
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During the charging of a lead-acid cell a its voltage increases b it gives out energy c its cathode becomes dark chocolate brown in colour d specific gravity of H2SO4 decreases Ans: a. The capacity of a lead-acid cell does not depend on its a temperature b rate of charge c rate of discharge d quantity of active material Ans: b.
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Theabovestatementisassociatedwith a Newton'slaw b Faraday'slawofelectromagnetic c Faraday'slawofelectrolysis d Gauss'slaw Ans:c 2. Duringthechargingofaleadacidcell a itsvoltageincreases b itgivesoutenergy c itscathodebecomesdarkchocolatebrownincolour d specificgravityofH2SO4decreases Ans:a. Thecapacityofaleadacidcelldoesnotdependonits a temperature b rateofcharge c rateofdischarge d quantityofactivematerial Ans:b. Duringchargingthespecificgravityoftheelectrolyteofaleadacidbattery a increases b decreases c remainsthesame d becomeszero Ans:a. Theactivematerialsonthepositiveandnegativeplatesofafullychargedleadacidbatteryare a leadandleadperoxide b leadsulphateandlead c leadperoxideandlead d noneoftheabove Ans:c 7.