Batteries quiz

More questions about Batteries

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   What acid is inside a car battery?

   Answer: Sulfuric acid

   Why: Overcharging splits some of the water in the acid into hydrogen and oxygen, a gas mix that can explode.

2. 2 Medium

   How many cells are inside an alkaline 9-volt battery?

   Answer: 6

   Why: The battery's standard code, 6LR61, begins with a 6 for the six cells stacked inside.

3. 3 Hard

   Which metal fills both tanks of the most common flow battery?

   Answer: Vanadium

   Why: With vanadium on both sides, ions leaking across the membrane cause no lasting contamination, so the electrolyte can last indefinitely.

4. 4 Easy

   How many volts does an alkaline D battery give?

   Answer: 1.5 volts

   Why: A D cell holds several times the charge of an AA, so it runs far longer, yet both give the same 1.5 volts.

5. 5 Medium

   What does the 20 in a CR2032 coin battery tell you?

   Answer: Diameter in mm

   Why: The last two digits give the thickness in tenths of a millimetre, so a CR2032 is 20 mm wide and 3.2 mm thick.

6. 6 Hard

   What do both plates of a car battery turn into as it goes flat?

   Answer: Lead sulfate

   Why: Left flat for long, that lead sulfate hardens into crystals normal charging can no longer break down, a fault called sulfation.