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What is the colour of a positive plate of a lead-acid battery?

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in Automobile Engineering by (80.5k points)
What is the colour of a positive plate of a lead-acid battery?

(a) White

(b) Grey

(c) White

(d) Brown

I got this question in semester exam.

My enquiry is from Storage Batteries topic in chapter Nonconventional Engines, Conventional Energy Sources & Cooling System of Automobile Engineering

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The correct option is (d) Brown

For explanation I would say: A positive plate of a lead-acid battery is brown in colour. A negative plate of a lead-acid battery is grey in colour. For each plate, there is a supporting grid made of an alloy of lead and antimony.

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