Formative 1.6 How Do Batteries Work?

What are the two materials commonly used as electrodes in modern dry cells?

• Copper and gold

• Zinc and carbon

• Lead and aluminum

• Sodium and magnesium

What prevents copper ions from depositing on the negative zinc electrode in a simple wet cell?

• A plastic cover

• A porous barrier

• A metal shield

• A rubber gasket

In a dry cell, what is the electrolyte absorbed in?

• A liquid solution

• A gel

• A powdery paste

• A solid block

What is often used as the outer cup in a dry cell?

• Copper

• Zinc

• Lead

• Aluminum

What type of rechargeable cells are used for computers and cellular phones?

• Lead-acid cells

• Nickel-cadmium cells

• Zinc-carbon cells

• Lithium-ion cells

What determines the voltage between the terminals of a battery?

• The size of the battery

• The type of casing used

• The combination of electrodes and electrolyte

• The color of the battery

What type of current do batteries provide?

• Alternating current (AC)

• Direct current (DC)

• Static current

• Variable current

What happens when a battery is not connected to a circuit?

• It stores charge

• It generates heat

• It does not allow charge to flow

• It loses its charge

What dictates the rate at which charge flows in a battery?

• The size of the battery

• The demand of the circuit

• The color of the battery

• The brand of the battery

What happens when a battery's demand exceeds its capacity?

• It provides full voltage

• It stops working

• It does not provide full voltage

• It explodes