Question

Two different 12-V automobile batteries on a store shelf are rated at 600 and 850 "cold cranking amps." Which has the smallest internal resistance?

a) The battery rated at 600 cold cranking amps.

b) The battery rated at 850 cold cranking amps.

c) Both batteries have the same internal resistance.

d) Cannot be determined without additional information.

Answer 1

The Cold Cranking Amps (CCA) rating measures a battery's capability to deliver current in cold conditions, crucial for starting a vehicle. However, this rating doesn't explicitly reveal the internal resistance of the battery. Internal resistance affects a battery's ability to provide power but isn't inherently tied to CCA. Thus the correct option is d.

Step-by-step explanation:

The Cold Cranking Amps (CCA) rating measures a battery's capability to deliver current in cold conditions, crucial for starting a vehicle. However, this rating doesn't explicitly reveal the internal resistance of the battery. Internal resistance affects a battery's ability to provide power but isn't inherently tied to CCA.

As such, batteries with different CCA ratings can possess varying internal resistances. Without direct information or measurements concerning their internal resistances, it's unfeasible to definitively determine which battery has the smaller internal resistance based only on their CCA ratings.

Hence, additional data or specific measurements regarding internal resistance would be necessary to accurately discern the battery with the lower internal resistance between the two options given.

Therefore, the correct option is d.